Uranus and Neptune (coming soon) and Prehistoric Bodmin Moor (also coming soon :))

Carolyn Kennett

I am really excited to share with you that my next book Uranus and Neptune is complete and heading off to the printers. Reaction Press have suggested a November release, I will update you all as soon as I know. More details about this book can be found below.

My attention has now turned back in time to prehistory and I have been putting together an updated gazette of ancient sites on Bodmin Moor called Prehistoric Bodmin Moor. This came about due to a conversation with Cheryl Straffon who produced a comprehensive guide to the sites on Bodmin Moor, which is now out of print and very difficult to get hold of. She did not want to update her book so I have put together an updated replacement full of lovely photos by myself and Jamie Ashley. It includes all the larger and more accessible prehistoric sites including the circles, rows and quite a lot more. I am hoping to have this at the printers in the next couple of months and will be selling it through Amazon online as well as having printed copies to sell through here. More to come soon 🙂

A comprehensive, accessible, and stunningly illustrated introduction to these far-off worlds.
 
The most distant planets in our solar system, Uranus and Neptune were unknown by the ancients—Uranus was discovered in the 1780s and Neptune only in the 1840s. Our discovery and observation of both planets have been hampered by their sheer distance from Earth: there has only been one close encounter, Voyager 2 in the late 1980s. The Voyager mission revealed many enticing details about the planets and their moons but also left many more questions unanswered. This book is an informative and accessible introduction to Uranus, Neptune, and their moons. It takes readers on a journey from discovery to the most recent observations made from space- and ground-based telescopes, and it will appeal to amateur and professional astronomers alike.

The Cornish mine experiment to Weigh the World part 1

Descending ladders into the mine to seek a suitable sub-surface location to run the experiment to measure the density of the Earth. Photograph credit: © Carolyn Kennett, 2021

How did we weigh the Earth (and why did this go beyond simple curiosity)? This may be a question people asked themselves during childhood, and have not considered since. Yet it is a question a small group of scientists, including myself, have returned to as we research experiments conducted in the 1820s in a Cornish mine to measure the acceleration due to gravity of the Earth.

In 2022 our intention to re-create the mine experiments by building a replica Kater invariable pendulum and taking it down a Victorian mine in west Cornwall to make measurements of gravity. We will set the pendulum in two locations, one overground and one underground, and time the swing of the pendulum in both locations. The difference in the rate allows us to calculate the amount of gravitational pull on the pendulum, as the underground pendulum will swing at a slower rate. The original experiment was conducted by George Biddell Airy and William Whewell in the deepest mine in England, Dolcoath. This has unfortunately closed and the lower recesses are flooded, so we are using a mine named Rosevale, which gives us a difference of 250 metres between the overground and underground stations. Although Rosevale is not as deep as Dolcoath (700 metres at the time of the original experiment), it gives the opportunity to explore how the experiment was conducted in what can only be described as less than ideal conditions. Mines are dirty places which can be excessively damp and hot. During the original experiment the scientists would have had to contend with vibrations and noise from the working environment, making their achievements all the more significant.

Why is this all important now you may ask? Yes, simple curiosity does play into this but we find ourselves in a time when the power of gravity is something we have learnt to manipulate and overcome. There are frequent launches into space and discussions of journeys to far-flung destinations such as Mars. Without the arduous and at times dangerous early experimentations into measuring the gravity of the Earth untaken by Airy, Whewell and others we could still be stuck without the knowledge to reach beyond our own planet. Therefore we think it is the perfect time to highlight the work they undertook and their achievements in what was an important building block for us to travel into space.

Blog post first appeared here –

http://www.scientificinstrumentsociety.org/blog

Goodaver: Then and Now

Please be aware Goodaver circle is on private land and permission must be sought before visiting it.

Within the digitalised Stanley Opie collection of photographs in Penzance’s Morrab Library, there are three images entitled “Unidentified stone circle. Possibly on Bodmin Moor”. The photos give an impression of a typical Bodmin Moor circle in the style of the Stripple Stones, situated on open moorland with extensive views. But on closer inspection, it cannot be the Stripple stones as the stones and landscape do not match details in the images.

Stanley Opie was an archaeologist who liked to take photographs of historic sites and archaeological digs in Cornwall. Born in Barncoose, Redruth in 1884 he used an Ensign Cameo No. 2 camera with Imperial Eclipse plates to take his photos between 1930–50. The collection is housed in the Morrab Library in Penzance and has been digitalised and is now accessible online and through authorised visits. During his career, he imaged many sites around Cornwall and some further afield and it must have been a huge job to try and identify some of the places in the images.

Examination of the three images shows them to be of Goodaver stone circle on Bodmin Moor. This may surprise people as a visit to the circle today is an entirely different prospect. The circle is surrounded by trees that have been grown as part of the local plantation. It gives an enticing view of how the circle may have been positioned and the possible sightlines. It allows us to postulates about astronomical alignments which may have been of importance to the original builders.

In recent times the whole site has become encircled by trees, other than a view to the west where the hillside drops to the farm and river bed below.

There was an opportunity to visit the site and image the circle before an attempt was made to match the orientation of the Opie photos and the landscape features within. It would be interesting to identify the possible sightlines from the circles if the trees were not in place, sightlines that the original builders may have had when choosing where to position their circle.

The Rabbit stone helped orientate the circle in the photos (to the left of the image

It helped that there are a number of unusually shaped stones. One in particularly got named the rabbit stone after having a similar profile of the Lindt rabbit, it can be seen on the left of this image. (I should say at this stage that the circle was heavily restored in 1906 and some of the stones are thought to have been replaced incorrectly, even upside down).

Opie Photograph no 1

This image took a bit of matching. The two central blocky looking stones and the rabbit-shaped stone on the right of the image helped orientate it. In my image below the rabbit, the stone is also to the right and slightly obscured by the rocks in front of it.

The rise in the ground beyond the circle is Brown Gelly, this is towards the southwest. This Tor is obscured by the trees in the left of the more recent image. The area has a number of interesting ancient sites on it including a number of Cairns on the top, which can be seen on the ridgeline of the image. There can be no solar or lunar alignment with these local cairns as they are too far to the south when standing within the circle.

Stanley Opie, “Unidentified stone circle. Possibly on Bodmin Moor,” Morrab Library Photographic Archive, accessed January 4, 2022, http://photoarchive.morrablibrary.org.uk/items/show/6371

Image 1 match

Opie Photograph number 2

This second image gives a more expansive view looking out from the circle to a number of ridgeways and hills beyond.

Looking at the stones in the image, the tall pointy stone and gap, next to the man at the front of the circle helped orientate the image, as did the rabbit-shaped stone behind him. The image looks from the south of the circle facing north.

The hill towards the centre-left of the image is Leskernick, it is possible that Bronn Wennili (Brown Willy) is visible to the left of the image. This is exciting as it means that standing in the circle you could have seen the summer solstice sunset over the distant hill. This is an extension of the line which starts at the newly discovered menhir on the ridge above the Hurlers circle, extends through Craddock Moor circle and the avenue at Craddock Moor, onwards to Goodaver circle. Making it possible to see the same summer solstice sunset at a number of important prehistoric locations across the moor.

Continuing to the centre-right of the image is the local plantation ridge. Fox Tor which is relatively local to the circle would have been to the right of the image.

The pointed stone which the man is stood beside in the Opie image is front left in the recent one. My image is orientated slightly differently from the old image. It would have been pointing directly down the field to the right of the modern image. Looking down the neighbouring field in recent times there is no possibility of seeing what hills lay beyond.

Stanley Opie, “Unidentified stone circle. Possibly on Bodmin Moor,” Morrab Library Photographic Archive, accessed January 4, 2022, http://photoarchive.morrablibrary.org.uk/items/show/6370

Image 2 Match 

Opie Photograph no 3

The Opie photo shows stones in profile against the sky above with no plantation beyond, the rabbit-shaped stone is in the front row of the circle on the central left. Matching it to my photos of the circle, it has been taken from the northwestern side of the circle down the ridge a little way. Kilmar Tor would have been visible if the photo had been taken with slightly increased elevation. This Tor is directly east from the circle and in the position of the rising sun at the equinox (midpoint between the solstices).  The modern photo has been taken from higher up the hill and the craggy tops of Kilmar Tor can still be seen through the gaps made by the less dense boundary of trees.

Stanley Opie, “Unidentified stone circle. Possibly on Bodmin Moor,” Morrab Library Photographic Archive, accessed January 4, 2022, http://photoarchive.morrablibrary.org.uk/items/show/6372

Image 3 Match

A plan of the matched direction of the photographs taken by Opie numbered 1-3

From matching the photographs old to modern I was able to make a plan of the directions that the Opie images were taken in: The plan below it is as follows:

R = Rabbit stone

L = taller long stone

Credit: Annotated Google maps image

Finally, I should add that within the Opie photographs none were taken in the direction of Hawks Tor in the west. This has been identified by Cheryl Straffon and John Barnett as an equinox setting position when standing in the circle. When visiting the circle in more recent times the Tor can still be seen in the gap made by the plantation to the west and is the one remaining solar alignment that could be viewed in action. Maybe one day the larger plantation trees will be replaced with smaller saplings and make the other viewpoints possible.

Access to the Stanley Opie collection and all the other wonderful historic digitalised images that the library has can be made here:

http://photoarchive.morrablibrary.org.uk/

Lighting the Darkness – Tregeseal passage grave and cross based urns


First appeared in Meyn Mamvro Issue 100, First Series, Winter 2019

https://www.meynmamvro.co.uk/archive/

Tregeseal, Scillonian Style Passage Grave


The importance of the Sun has been recognised throughout history. This luminous body defined the lives of people it shone on and the clocklike regularity of its rise and the set was well understood by humanity. Due to its significance symbolic representation of the Sun stretches far back into prehistory. Designs including the Sun weren’t uncommon and by the Bronze Age examples of solar symbolism are found across a range of mediums. Drawings and designs were often abstract in nature. Representation included circles, waves and cross shapes. The cruciform shape in particular has been linked to the Sun by Mary Cahill (2015) and her work on Irish Sun discs. These are flat circular objects made of gold, designed to shine brightly when sunlight radiates onto them. The etching of a cross on the surface shows the rays of the Sun in a conceptual way, maybe representing various solar events such as; Sundogs, pillars, rays and halos. Although no Sun discs have been found in Cornwall, these golden objects have also been linked to the lunula. A lunula was found with a pair of Sun discs in Coggalbeg, Co Roscommon, confirming an association. Furthermore designs on lunula lend themselves to observation with sunlight. There are examples of lunula found here in Cornwall and if you get the chance it is worth visiting the Penlee House Gallery where the Penwith Lunula is on display.

Sun discs with cross-shaped designs were found at Tedavnet, Co. Monaghan Ireland. Image Credit: The British Museum.


Other objects discovered in Cornwall from this period incorporate a cross design. Although perhaps not as glamorous as a golden disc, local urns can include a similar decoration. Trevisker style urns are a design of urn which are predominantly found in the South West of the UK. Dating from the Bronze Age the style is known for its hash/dash and zig-zag lines and use of local materials such as gabbroic clay from the Lizard peninsular. On occasion, the urns have a cross or cruciform design within the interior of the base. This seems to be a rare occurrence but there have been examples of cross based urns found at the Trevisker village excavation, Boleigh barrow, Tregeseal chambered tomb and an example from further afield in Kent. This final example was placed in a ring ditch, and the soot recovered from inside the Urn was radio carbon-dated to 1600-1320 cal BC. It was found shattered into over 200 pieces but was reconstructed, with its internally crossed base being clearly observable.
The urn from the Tregeseal chambered tomb was recovered by William Copeland Borlase in 1879. Found at the end of the passage, in a separate area, it was recovered almost complete by Borlase during his excavation. It now resides within the British Museum. Tregeseal Chambered tomb is part of a group of Bronze Age entrance graves in Penwith which include Bosiliack, Tregiffian and Pennance. As an aside radiocarbon dating results on a burial at Bosiliack gave 1690-1510 cal BC (Jones, A and Thomas, C. 2010) a similar date to the urn found in Kent. The Tregeseal urn is a large example and is 21 inches in height. The Cross shape was meticulously drawn in plan form at the time. The plan was reproduced in the London Illustrated Times and it can also be seen on the wall of the Penlee House Gallery Museum in Penzance.

Trevisker Urn from Tregeseal. Image Credit British Museum Collection Online.
The cross itself would not be integral to the structure of the urn. There seems to be no practical explanation as to why an urn of this size would have this addition in the base. It is therefore interesting to consider if some Trevisker urns could be following the tradition of Sun discs and offer a design that is indicative of solar symbolism? One aspect which strengthens the case of this idea is that the Urn would have started as a disc shape on which the cross shape would be added. Then the sides would have been added to the urn creating the final vessel. Looking down from the mouth of the urn it would have clearly taken on representation of the Sun in a similar way to the Sun disc design. An alternative explanation has been offered by Kavanagh, R (1973) who suggested that the cross was added to demonstrate a bottom of a basket and was a nod to the basketry traditions of the period.

The Tregeseal Urn base – in plan.
Image credit: Report by W.C Borlase circa 1879


The Tregeseal example was discovered within the tomb base up, containing cremated remains. So the cross would have been above the remains. This could have been intentional. Many funerary urns are found base up. A cross at the top could represent a number of ideas. A Sun in the dark? A route to the heavens? A set Sun? There was just one time of the year which the Sun would shine down the chamber to its rear. This was the winter solstice sunrise. A recent survey undertaken by Carolyn Kennett and Grenville Prowse supervised by Penwith Landscape Partnership archaeologist Jeanette Radcliffe found the passage to be orientated at 128degrees. This orientation towards the solar extreme of winter solstice sunrise is in common with local tombs at Bosiliack and Pennance. On this day the sunlight would shine down the passageway hitting the back upright stone at the rear. The urn was positioned behind this back stone in a separate area or cist. Although currently it is difficult to understand the full design of the tomb, as this rear section has been removed and our understanding is reliant on the original plan from the Borlase excavation. It is also worth considering if the positioning of the urn in a separate section was intentional? This position would ensure that no natural sunlight would reach the urn at any time. The symbolism may have shown that it was providing its own light, even on this important day of renewal in the solar calendar.
A photograph taken by Gibson and Sons at the time of the excavation shows a possible blocking stone at the start of the passageway, which would have further limited light down the passage on the solstice. There is no evidence remaining of this stone now, so it is difficult to understand the overall effect this would have had on limiting light at the solstice. It is worth remembering that the final resting place of this urn probably came after a life of servitude. The urn in Kent had traces of animal fats within it and was probably used as a transportation vessel for food before its final role as a funerary urn.
Trevisker style urns are not the only vessels to include crosses on their base. Although in general this cruciform addition to urns is rare and seems to be reserved for the more decorative funerary examples. Other examples of cross based urns have been found in Ireland, Scotland and Yorkshire.
As a final thought, I doubt we shall ever know the full truth behind this oddity in the design, but it is a nice idea to consider that the cross was added by our ancestors to bring light to the darkest of places.

Cahill, M. (2015) Here comes the Sun – Solar symbolism in Early Bronze Age Ireland. Archaeology Ireland 29(1), 26-33,, 2015.

Jones, A and Thomas, C (2010) Bosiliack and a reconsideration of Entrance Graves. Proceedings of the Prehistoric Society. 76, 2010, pp 271-296.

Kavanagh, R (1973) The Encrusted Urn in Ireland, Proceedings of the Royal Irish Academy: Archaeology, Culture, History, Literature, Vol. 73 (1973), pp. 507-617

Sun and Moon at Boscawen-ûn

By Carolyn Kennett

First published in Meyn Mamvro 95 (Spring/Summer 2018) and still can be read in the collected works Watching the Sun Booklet by Meyn Mamvro and Mayes Creative (2021)

Boscawen-ûn summer solstice sunset (Credit Carolyn Kennett)

During the last few years, in many ways, Boscawen-ûn became a second home to me. While waiting for sunrises and sunsets I observed the change in the seasons at the circle, all accompanied by the changing looks, sounds and smells.  But one thing remained the same and that was the tranquillity of the site.  I kept some strange hours, as I was mainly there for sunrises or sunsets and quite often at night.  More often than not I was alone in the circle, sometimes for hours on end.  One of these visits, in particular, comes to the forefront of my mind.  Having risen when it was still dark, I drove to the circle with the beginnings of dawn, hoping the low developing horizontal cloud would clear.  I arrived in time for the sunrise of the 25th June 2016.  The week had been wet and the solstice had passed behind a thick blanket of cloud. I stood atop Creeg Tol willing the low bank of clouds to blow out of the way, even though I knew I was nearly a week late to see the summer solstice sunrise.  The vantage point of Creeg Tol meant that I would see the Sun peer above the horizon, something that I could not replicate in person in the circle below due to the large hedge obscuring this direction. The dawn had a stillness about it which makes it one of my favourite times of the day.  The clouds were starting to disperse and right on schedule, the Sun started to peer above the horizon, accompanied by the mixed dawn chorus of birds, roosters and cattle.  I photographed the sunrise from my vantage point at Creeg Tol and set off down the hill towards the circle.  About halfway down into the hill I started to lose the sunrise, the Sun was setting behind the hill it had just risen from.  By the time I reached the circle the Sun was once again well below the horizon.  I realised that without the hedgerow I could witness the Sun rising twice, in effect a double sunrise.  Once from atop Creeg Tol and then again from inside the circle.  I hoped this would work in reverse: with the Sun setting visually from the circle and once again from Creeg Tol.  It was an idea I would test out repeatedly over the summer months with great success.  I think this double sunset and sunrise during the summer months is one of the most visually beautiful aspects of the circle.  A local settlement Goldherring, which has some Bronze Age round huts is north of the site and people could have accessed the circle from the direction of Creeg Tol.  Double sunsets and double sunrises are something that we can all witness from the site and this is only the beginning of what makes Boscawen-ûn astronomically special.

It is important to consider Boscawen-ûn in the landscape as holistically as possible.  During this project, I wanted to consider the way the circle sat at the base of the northern hill, in what would have been a marshy area and quite possibly difficult to get access to, particularly at wet times.  Why had it been positioned here?  What would have been seen in the sky?  It was equally important to view the site as a part of a changing landscape, where man has shaped and changed the site itself over a large period of time as well as the surrounding landscape.  I am a great believer in looking what archaeoastronomy ideas have been historically suggested about a site.  These historic ideas brought another list of questions such as: Is there any truth in a Lunar link at Boscawen-ûn? Does the carving on the back of the central stone light up at summer solstice?  These were just the start of a list of burning questions that would keep me returning to the site, making measurements, and calculating positions of celestial objects over the coming year.  Hopefully enabling me to answer if the site was built with astronomy in mind.

I started by considering if there were any alignments between the circle and features on the horizon.  This meant that I needed to map out all the natural and man-made features which would have been found from the period of the stone circle.  This was in itself quite a task.  The internet was a wealth of information, but local knowledge from people such as Cheryl was a great help to me.  Many local sites such as barrows and menhirs had disappeared and I needed to try to reconstruct where they were as accurate as possible in relation to the circle.  My final list identified 48 local features or as I would name them, targets.  These targets would then be considered against a number of pre-selected celestial events.  If all 48 targets were considered against the chosen celestial events, statistically a match would be highly likely.  For instance, if we were to consider the targets located around the site in a circle of 360 degrees. If each target considered covered 1 degree with an error of +/- 0.5 degrees a total of 96 degrees or just over a quarter of our circle would be covered in targets. (The error from this project was set as 1.04 degrees this came from a small amount of measurement error as well as error for refraction, extinction, and parallax).  Statistically, this would mean that it would be far more likely for a target to make a match with a considered event.  Therefore to make the project more robust I needed to reduce the number of targets.  I decided first of all to consider targets that were visible from the site and only targets that sat proud against the horizon.  The reduction in targets could have been undertaken in a number of ways but I felt that this made the most robust format for retesting any results.  This left me with just 7 remaining targets out of the original 48 to match with my events.  These were as follows:

The Lamorna Gap – yes it is just visible from the site through the hedgerows.  A smaller sea gap further south to the Lamorna gap, Creeg Tol.  A barrow just west of Creeg Tol, Chapel Carn Brea, Boscawen-ûn Field Menhir and finally Bunkers Hill Menhir (East).  Once the targets were identified I made on-site measurements of their azimuth and altitude and this was converted into an astronomical declination.  Alongside the on-site measurements, I ran a computer program called HORIZON.  This also gave me declinations for my 7 targets and it acted as a test of accuracy for the on-site measurement, as well as allowing for reconstruction of the horizon behind the hidden, hedgerow covered NE direction.

Boscawen-ûn Field Menhir, with possible fallen menhir in hedge behind (Credit Cheryl Straffon)

Next, I considered which astronomical events I would examine alongside the targets. I decided to look initially at five events in total.  These five events would give 14 positions along the horizon: 7 rising positions and 7 setting positions.  These were the extremes of the solar calendar or the solstices, as well as the solar equinox positions.  I also considered the lunar standstill positions both for lunar major and lunar minor.  I then calculated the declinations of these 14 events for a date of 2500BCE.  The horizon position of a solstice Sun and the lunar positions in 2500BCE has moved slightly compared to its current position, whereas the equinox would be in virtually the same place.  So a rising solstice Sun would have a declination of 23.9 degrees in 2500BCE whereas it would have a declination of 23.4 degrees currently which is on a flat horizon at the latitude of Boscawen-ûn equates to an azimuth difference of 1.02 degrees.

When all this was considered I could look for matches between my 14 events and 7 targets.  I could see immediately that 4 of my 7 targets declinations matched with one of the fourteen identified events, within the limits of the error I had set.  The first and probably most primary of these is that an observer in the circle at 2500BCE would see the winter solstice sunrise rising from the Lamorna Gap.  The Lamorna Gap at present is obscured by hedgerows, but without this vegetation would have been a subtle sea view at best.  The Lamorna gap declination was measured as -23.6 +/-1.04 degrees, matching a winter solstice sunrise of 23.9 degrees.  Also, you must consider that the sea view extends for more than 1 degree along the horizon and that this event could be observable over the coming millennia.

Winter Solstice sunrise

This first alignment extends through the circle to my second alignment.  This is to a barrow which is no longer visible, it was located to the west of Creeg Tol. It would be in the position of the summer solstice sunset when observed from the circle.  It had a measured declination of 24.3 +/- 1.04 degrees coinciding with the declination of 24.9 degrees.  Equally an observer at the barrow would have been in a position to observe the winter solstice sunrise out of the Lamorna Gap.  Its position just above the circle would give an observer a more advantageous height and a more pronounced view of the winter solstice sunrise from the Lamorna Gap.  It is interesting to note that the winter solstice sunset at this time would just fall into the large sea gap at the Tregeseal stone circles.  Although at Tregeseal the sea gap is far more pronounced, there is possible that there is a connection between the two sites on this date.  

The other two matched alignments came between the circle and lunar major standstill positions.  I found that the position of Creeg Tol matched the lunar major sunset northernmost position, it had a measured declination of 28.3+/-1.04 degrees coinciding with an event declination of 28.9 degrees.  The nearby Boscawen-ûn Field menhir was the final alignment and it was in the lunar major sunrise position.  This had a measured declination of 28.9+/1.04-degrees which coincided with the event declination of 28.15 degrees in 2500BCE. The position of the Field menhir was slightly to the west of calculated declination for the lunar alignment, but it is conceivable that another stone now recumbent in the hedge made a pair and this pair once framed the rising Moon at the extreme of the lunar major cycle.  Although we should note here that it may not have necessarily been a full Moon at that time, as the Moon at its standstill declination can be at a number of positions within in its phase cycle.

Lunar standstill links are not well documented in Cornwall.  They are considered a feature of recumbent stone circles in East Scotland but have also been found in western Ireland and more recently in western Scotland.  The discovery of two lunar standstill points at Boscawen-ûn is both interesting and intriguing; raising more questions than it answers.  Boscawen-ûn does have myths surrounding it which are linked to the lunar cycle, so this could be a feature of this site.  Future work in west Penwith will consider evidence for lunar links. For instance, the Merry Maidens which I had discounted through my reduction of data, as it did not stand proud against the horizon is in the Lunar Major Standstill Southern rising position from Boscawen-ûn with a declination of 29.9 degrees.  This concludes the main horizon findings but as I said I also looked at other features within the circle.

Boscawen-ûn hedge menhir (Credit Carolyn Kennett)

The positioning of the quartz stone to the SW of the circle could signify the start or end of the winter season, but due to its localised vicinity to an observer, it could never pinpoint an actual date, without another position to line it up.  The stone on the opposite side could have well been used to align the position but this does not line up with anything calendrically significant.  The quartz stone does though align with the cist (located in the NE of the circle) and the out of sight Boscawen-ûn Hedge menhir.  The summer solstice sunrise would have occurred along this alignment around 2500BCE.  This alignment was first suggested by Norman Lockyer in his consideration of the circle.  There is another stone between the Hedge menhir and the stone circle, this would possibly bring inter-visibility between the circle and the Boscawen-ûn Hedge menhir.  Even so, there are numerous examples of standing stones being just over brows of ridges that form alignments so this could be a viable consideration when looking at this alignment.

The edge of the foot at the bottom of the central stone is illuminated (Credit Carolyn Kennett)

Rock art carving (or either foot or axes) have been identified on the central stone.  I was able to calculate the amount of time the art would be illuminated for in the year 2500BCE. The art on the back of the central stone is only fully illuminated in and around summer solstice sunrise.  Without any vegetation, a full illumination would occur for 30 days on either side of the solstice.  The maximum time in minutes that the art would be illuminated would occur on the summer solstice.  This amount of time would reduce each day until a full illumination could not happen 31 days later.  It must be noted that this measurement takes into account a completely flat landscape.  Any vegetation would significantly reduce the length of time and amount of days the art would be fully illuminated.  Partial illumination of the art also occurs and this time it happens both in the morning and the evening in and around the summer solstice, this partial illumination would occur over a much longer period.

There are many more suggestions that could be made particularly linking stellar events to the site. Without more accurate dating these suggestions must be taken under advisement.  For instance, the Pleiades would set over Chapel Carn Brea in 1500BCE but at an earlier date of 1800BCE, it would have set to the south of the framed hill.  I did consider if the central stone could have pointed at a star.  The only bright star that it could have pointed at was Arcturus and this would have been at a remarkably early date of 3820BCE.  This must be taken under advisement, as the stone could have moved over time.  Overall the suggestions of stellar alignments without accurate dating are always difficult to suggest. It does seem that a number of astronomical features were considered by the builders of Boscawen-ûn.  They certainly had an eye for the solar calendar within the design but perhaps more unusually a knowledge of the lunar cycle.  This project, for me, has raised more questions than it answered and I will be continuing it by looking for further examples of lunar alignments within Cornwall and trying to draw more conclusions about the astronomical features at some of the other Cornish circle sites.

More of this story can be read about in my book Celestial Stone Circles of West Cornwall. Which can be accessed here

2021 roundup

Even with its challenges, 2021 has been a busy year, both for my own practice and projects that I have been working on with Mayes Creative.

Here’s a bit of a round up of some of the fun and antics I’ve been involved with this year. Most of it is here in Cornwall and I’m really grateful to have met some wonderful people along route, making friends with lots of amazing creatives, historians and scientists.

In no particular order

Dark skies achieved for west Cornwall 🥳 with Sue James and Jon Brookes at the announcement
Book finally finished, only a year (or so) late for the 200 year anniversary, but who’s counting!!!🤣🥳
Winter Solstice dawn to dusk walk 2021 – it begins!!!!
Down a mine choosing a spot for the pendulum experiment to weigh the world
Filming with the Coastwatch talking Wild Weather at Cape Cornwall for the Tin Coast project.
Leading a CASPN walk to Boscawen-ûn stone circle. Stood with Cheryl Straffon and John Moss at the start.
Leading a group of artists on a walk in Coverack talking sea roads.
Watching Harry Fricker at work durimg the Coverack artist residency
Jo Mayes cooking up alternative film processing stuff at the Coverack artist residency
Sound recording at the Hurlers with Mayes Creative, Justin Wiggan and Rex Henry
Getting ready for a solar eclipse with GCSE Astronomy students
Flower Bashing with the fab CN4C from Redruth in Zennor this summer
A walk from Sancreed to Carn Euny talking ancient skies for the Penwith Landscape Partnership and Mayes Creative
Digging a hole with the PLP under the watchful eye of Laura the archaeologist.
Providing skyscape data for Pheobe Herrings amazing reconstruction of Bartinney
Shallal making music and dance at Tregeseal
More music making at Tregeseal stone circle with Shallal
Stargazing with CN4C at Dolcoath mine part of Mayes Creative Above and Below project
Walking a group from the Cot valley to Tregeseal, learning a little Cornish onroute. With Mayes Creative.
Helping Terence Meaden take measurements at the Merry Maidens
Make and Do. Isles of Scilly dark skies week at St Martin’s Observatory, making Solar Cans
Finally not on zoom at Dark Skies Week St Martin’s Isles of Scilly
Polishing a greenstone axe at Helston Museum with Serpentine worker Don Taylor
Sea to Stars trailer out and about at Goonhilly Earth Station
Back out with Shallal making noise in Carn Euny Fogou
In a Fogou with Justin Wiggan sound testimg
Me down a hole again, this time with Jo Mayes filming
At Pendeen fogou with Justin Wiggan
Pip’s choir singing in the landscape on a walk I led around Zennor
Pip Wright’s choir taking inspiration from Zennor hedges ready to make songs for Mayes Creative Above and Below project
At Gwealon Tops Redruth with Manga Drawing ace Keith Sparrow, talking astronomy history to kids, making manga drawings of Edwin Dunkin. (Edwina Dunkin as he became known 🤣)

And thanks to my wonderful partner Jamie Ashley for taking the photos of me xxx

Winter Solstice Walk 2021

Winter Solstice is the day we mark the longest hours of darkness and the movement towards the lengthening of daylight hours once more. For many it is a powerful time in their calendar, a day to mark the start of a new year, to reflect on what they can leave behind and look forward to the time ahead. There are a number of ancient sites within Cornwall that have links to the Solstice and many of these suggest a relationship that our ancestors had with this moment within their in their lives. Connectivity that we feel resonating through the ages and is particularly heightened at times such as this one.

This year a small group of us decided to join the ancient pathway the Tinners Way to the north of Zennor and walk to the Tregeseal stone circle. A walk which we would start in the half-light before sunrise and end after we had watched the sunset at the stone circle. Anyone who knows me will hear me talk about my love of the wider Tregeseal landscape and how I believe it lends itself to a winter solstice gathering; where people can watch the sunset over the distant Isles of Scilly. The whole of Penwith is rich with prehistory, and a large number of the sites are along the Tinners Way and the direction of travel we would be moving in would take us towards the southwest and the setting sun. An imaginary line could be drawn through the monuments we were to visit and a number of them, if you had stopped there, would have the setting winter sun at another monument further along our journey, making a long winter solstice line of running down the spine of Penwith hills and part of this journey for me is to see how far people could process through the landscape, on the shortest day of the year, with a final destination in mind.

I am very interested in the ideas around processional journeys and movement through the landscape, particularly ones which would connect people to the ideas of cosmologies and be started in the time of dawn and end after sundown. I hoped the small group who joined me that day were also in the same mind. This was also a time for us to take a moment out of the daily grind and reflect on what we wanted to leave behind and how we would move forward, with mindfulness, into the next year of our lives. Walking has become a really important part of my life and during the last two years of upheaval and turmoil, I have come to appreciate the quiet and reflective time I can enjoy when out in the landscape, but it is always wonderful to be joined on an adventure especially a journey of such length, which would require both fortitude and endurance.

We met in Zennor just before dawn and the sky was in the main overcast, the clouds pink with the nearing sunrise. The Moon, which had been full two days prior, was still in the sky in the northwest, bringing an added element of light. Starting our journey we travelled up Rosevale valley, stopping to gather our thoughts for the day in the old and ruined miners cottage by the riverbed. It was commented on how we were a group of seven, six humans and a white wolf and in that moment of time it all felt a little otherworldly, like the start of a plagiarised fantasy tale., we all laughed at the sentiment and with the sunrise, we started on our way. Mulfra Quoit was a couple of miles away and we had to initially join the Tinners way, reaching it at the roadside near where the once impressive Tol Creeg passage grave had been destroyed and then removed in the 1960s. looking behind us we could see Zennor Quoit standing proud on the ridgeway and we got out first view of the southern coastline looking down the valley to the bay and St Michaels Mount.

The first hill of the day was in front, with Mulfa standing prominent on the top. We had settled into a nice pace at this point and think we were all excited about reaching our first ancient site of the day, one of many more to come. We had dropped into a rhythm of walking in pairs with the white wolf running back and forth between us covering triple the distance we were.

My 100 year old Box Brownie makes an appearance

Mulfra was an opportunity to take a morning break. We huddled inside the quoit listening to the wind rip around outside. We marked the occasion with songs, poems and blessings while thinking about the journey ahead. We had a decision to make, would we continue along the Tinners or drop through Bodrifty courtyard house village and head towards Ding Dong mine, which would enable us to walk the processional route past Nine Maidens, we chose the latter. Walking down the hill to Bodrifty courtyard house village proved interesting, the white wolf, who often chose to be in front, stopped short and started to howl, spooked by something we could not see, but it nevertheless brought us all up short with notions of ancestors, meaning and what the animal could sense that we couldn’t. I must admit I really like Bodrifty, I often spend time here in the summer and as ancient sites go, I always find it peaceful, and have never had a sense of anything foreboding at the site, neither had anyone else when we discussed it, but its amazing how common ancient sites invoke feelings that we cannot explain, that connectivity with the past runs deep through us all and visiting some sites can have profound effects on peoples emotions and sense of being. With some convincing, the animal seemed to move beyond what had been bothering it and started to visit the ruined huts alongside us all. As we explored the sun started to send shafts of light onto the southern coastline and even at the distance we were from it, we could see part of the ocean shining golden. A promise of what was to come and a brightening of the skies ahead.

On reaching the path to Ding Dong we swung our journey to face to the north and started to walk the pathway to Nine Maidens on the top of Boskednan moor. Taking a moment to stop at the barrow we faced the impressive rocky outcrop of Carn Galva and took a moment to reflect on the people past doing the same of what we were about to today. This ridgeway is lined with barrows on both sides and by moving along it towards Carn Galver you really are walking in the footsteps of the many who have come before. I thought about the people who had built the monuments, those that had excavated them in the Victorian people (bless William Copeland Borlase and his dodgy excavation techniques :)) and the people who still come here today. The circle itself was a natural place to stop and talk about the Moon. If you are able to return here in 2025, the standstill year, you will see the moon set over Carn Galva. I would recommend heading to see the bright winter full Moon which will set over the rocky outcrop. This is a possible reason for them positioning the stone circle as they did. From here we could see the hills which we would be approaching later in our walk, those of Chûn and Kenidjack. We could also see the marker Boswen’s Menhir, which has been positioned in the winter solstice sunset position from the circle.

Box brownie image

This seemed like a good spot for a break for lunch, the ridgeway is exposed we headed for the ring cairn and its large triangular stone., where we chatted and watched the sun emerge from behind the clouds for the first time that day.

Rested up we headed down the hill to Mên Scryfa, an inscribed stone which was recommissioned in the early medieval period, originally, most likely, being a much earlier menhir. the inscription reads Royal Raven and could mark the resting place of Bran, Welsh King who had been hiding out at Caer Bran before being attacked and chased to his death at this spot. I like to think there is treasure underneath but maybe treasure from the Bronze Age, a Trevisker Style Urn with cremated remains in, rather than a king from the dark ages. The Mên-an-Tol was one of the first times we met people, others out marking the solstice day, a number of us took the opportunity to wiggle through the holed stone, the lack of water at its base made it a more present prospect than usual.

Fun at the holed stone

Once more we had a decision. we could head towards Chûn from here, but as we had time we decided to zigzag and include Bosiliack and Lanyon on our journey and I am so pleased we made that choice. A number of the group had never been to Bosiliack Scillonian style passage grave before and the adjoining Bronze Age village. This is such an impressive monument, perhaps even more so since it wasn’t known about until the 1980s when a gorse fire uncovered it from the undergrowth. The excavation revealed so much about the tomb, and it contained cremated remains from the Bronze Age, along with a much later dated skeleton. The tomb felt important to me to visit on this day, as it is orientated towards the sunrise at this time, and I have photographed it myself in a previous year. I doubt anyone would have been able to watch from inside, but it shows how as a community that wanted to mark this day and maybe bring light to their own ancestors who were buried within the tomb.

It had been a long time since I had approached Lanyon Quoit from this direction and although viewed from nearly everywhere else it sits within the landscape, this is one direction where it stands proud on the horizon, impressively towering up above everything around it. This quoit is interesting in that it was rebuilt after falling over and is not necessarily how the original designers, back in the neolithic imagined it.

From here we started to see the sun break through the clouds with more regularity, it was arching low in the sky and we realised that although we had a fair way to travel, the sun was well past the mid part of the day, time for us all to move on again.

The next stretch was longer again and we approached Chûn Castle from the farm in the dip. The wind was howling and we didn’t hang around too long in the Iron Age hill fort before we headed down the hillside to the neolithic quoit of Chûn. Unlike Lanyon this quoit is in fantastic condition, which says a lot about our ancestors. The people who came millennia later in the Iron Age and built the hill fort must have held some beliefs about the monument, as they left it intact on the hillside and did not rob the stone from their grand hilltop fortress. The quoit’s capstone is heavily decorated with cup marks and there is still room to wiggle inside, which is fun. Standing here for sunset you would see the sun dip behind Carn Kenidjack and a number of people were already making their way up the hillside, in the opposite direction to us watch the sunset from this location as we headed down the hillside to Tregeseal.

I had wondered if our small group were rocked out!! But they were still keen to see as much as we could and we stopped at Portherras cist and after much chatter all day we decided we would walk the next section to the inscribed stone in quiet, giving us a time to reflect on the journey we had made already and the time ahead at the stone circle. As we walked in the direction the sun was already dropping fast and low in the sky. This was a moment I think we will all cherish from the walk, as a group we can often lose the quiet purpose behind our decision to make the journey.

The inscribed stone was very apt, most likely a Christianised menhir this stones inscription reads TAETVERA. This is Latinised 7th century Cornish: Taithuere, or “exalter of the journey”. I have read that St Just himself could be buried here, once more I like to think that if anyone was then it is most likely an urn of Bronze Age cremated remains underneath the cairn at its base.

As we reached the holed stones it was incredible to see the low golden sunlight come along the row of stones, making shadows along the line of them. I love these holed stones and feel they have a really important role to play on the wider Tregeseal landscape, I reflected how long it must have taken for people to have made the holes and how they could have been used to mark the days, through the shadows and beams of light shining through the holes, possibly at this time of year. As we sat watching the sun from this location I checked my watch and the sun passed the actual moment of solstice. The time when the sun is directly above the Tropic of Capricorn. The sunset was also fast approaching and we needed to move to the circle below to watch it.

Tregeseal is such a special landscape to watch the winter solstice sunset from. A lot has changed since the circle was built. Originally another circle stood next to this one, and the huge hedge to the south was not put in place until the mid 20th century. Nevertheless, you can get a small sense of what it was like for people who made the journey to this site to watch the sunset on the solstice. There is a small glimpse of the sea, and on this sea gap on a clear day you can see the distant Isles of Scilly and it is on these islands that the sun will set. Suggesting connectivity which we can see reflected in shared monuments and material goods between the islands and mainland. At this moment more people came to add to our group and we celebrated the closing of one chapter and moved into the next with the setting of the sun on the shortest day of the year.

With weary legs and tired feet we had one more hill to climb back to our transport, we made this in the gloom of dusk; the night was fast approaching and by the time we reached the end, reflected sunlight could be seen on Venus and Jupiter. A reminder that sunlight was ever-present even in the darkest of times

I want to thank everyone who joined me on this walk and I am so pleased the weather was much improved to last years, Lanomrna Gap to Tregeseal.

We will be back next year with another walk, so if you are mad enough to want to join a hardy but fun bunch of people on a full day winter solstice walk let me know.

At Tregeseal stone circle

Places visited

Mulfra Quoit, Bodrifty courtyard house village, Nine Maidens stone circle, Nine Maidens barrows, Ring Cairn, Mên Scryfa, Mên-an-tol, Bosiliack passage grave, Bosiliack bronze age village, Lanyon Quoit, Chûn Castle, Chûn Quoit, Portharras barrow cist, Inscribed Menhir, Kenidjack Stone row, Tregeseal barrows, Tregeseal stone circle 

Dark Skies Cornwall

Stargazing at Lanyon Quoit on the West Penwith peninsula (Image: Su Bayfield)

West Cornwall has been awarded Dark Skies Status by the International Dark Skies Association. Over the previous four year I had the pleasure of working with a group of interested individuals whose dedication has brought about this wonderful designation.

Here is the press release:

Dark skies above West Penwith officially recognised with prestigious International Dark Sky Park designation

The skies above West Penwith are now officially recognised with the prestigious International Dark Sky Park Designation, awarded by the International Dark-Sky Association (IDA).

Recognised as an Area of Outstanding Natural Beauty since 1959, West Penwith is only the seventh area of the UK and the second in Cornwall (after Bodmin Moor) to become an International Dark Sky Park (IDSP). The West Penwith IDSP covers the westerly section of Cornwall’s AONB; it stretches around the coastline from the outskirts of St Ives, through to St Just, Sennen and around Land’s End to Mousehole. Inland it takes in Trethewey, Sancreed and New Mill. The IDA’s IDSP Designation recognises this area as being naturally dark at night, with minimal traces of light pollution, making West Penwith one of the best places in the world to view the beauty of the night sky.

Cornwall Council supported a partnership among residents, businesses and councillors to achieve the accolade. A Steering Group comprised of local Councillors, Cornwall Council Officers, PK Porthcurno, Land’s End Accommodation Providers, The National Trust, Cornwall AONB Unit, Mayes Creative, Penwith Landscape Partnership and other passionate locals led the efforts for this IDSP nomination.

“West Penwith never faltered in its pursuit to celebrate and protect its night skies,” stated Ashley Wilson, IDA’s Director of Conservation. “The Steering Group worked closely with IDA on the necessary components to craft a thorough and complete nomination. Through this experience, Cornwall Council encourages communities both inside and outside of its borders to look to the stars and do their part to protect this natural, cultural, and precious resource. We hope to see the success of these efforts continue to grow over time to protect night skies and the nocturnal environment across the landscape scale.”

A dark night sky has wide-ranging benefits. This designation means that the partnership will continue to work to:

  • Preserve and enhance the dark night sky above West Penwith Area of Outstanding Natural Beauty (AONB) for pleasure, leisure and to support the wellbeing of residents, visitors and wildlife
  • Raise awareness of the importance of a dark night sky and encourage a reduction in light pollution
  • Engage with individuals and groups, in the wider West Cornwall area, to grow an outreach and education programme for astronomy, nature, historic environment and human well-being
  • Guide residents and visitors to the most appropriate locations and opportunities for appreciating the dark night sky
  • Promote eco- and astro-tourism
  • Inspire other designated landscape areas, within Cornwall and beyond, to appreciate and protect their dark skies, both formally and informally.

Mayor of St Just-in-Penwith, Sue James stated:

“When I was Cornwall’s Cabinet Member for the Environment, I was asked to support two local Parish Councillors to achieve their goal to get the pristine skies above West Penwith recognised. We formed a Steering Group to gather and document the needed evidence, engage with local councils, residents and visitors and work with the IDA in Arizona, whilst also engaging with residents, local councils and visitors. We had to show not only that we had splendid dark skies (and we all knew that) but also that we valued them and could put in place measures to monitor and protect them.” 

Cornwall Council cabinet member for Environment and Climate Change, Martyn Alvey said:

“This is a tremendous community led achievement which officially recognises what we already knew, that West Penwith has a fabulous night sky which its residents are understandably proud of.  It means that more people will get to know about it and come to enjoy and appreciate it.”

Kevin Hughes (former Parish Councillor) explained his reason for wanting this important designation:

“Under a pitch black starry sky in West Penwith, when sitting by some of the ancient monuments, we are looking at the very sky that 2000 years or more ago our ancestors were looking at. We must protect that sky for future generations to also be able to appreciate and wonder at.”

The following excerpt from Dark Sky Island by Enya (2015) first inspired Kevin to support this movement:

“Twilight comes to close the day

And let the night break free,

and from deep blue skies the heavens rise.”

The Steering Group thanks all those within and beyond their community that have supported and encouraged their journey. While some individuals were involved with this process as part of their paid day job, many more have given their time as volunteers.

About the IDA International Dark Sky Places Program
The International Dark Sky Places Program was founded in 2001 as a non-regulatory and voluntary program to encourage communities, parks, and protected areas around the world to preserve and protect dark sites through effective lighting policies, environmentally responsible outdoor lighting, and public education. When used indiscriminately, artificial light can disrupt ecosystems, impact human health, waste money and energy, contribute to climate change, and block our view and connection to the universe. West Penwith now joins more than 185 Places that have demonstrated robust community support for dark sky advocacy and strive to protect the night from light pollution. Learn more by visiting www.darksky.org/conservation/idsp.
 
About the IDA

The mission of IDA is to preserve and protect the night-time environment and our heritage of dark skies through environmentally responsible outdoor lighting. Learn more at darksky.org.

 

 

 

 

A couple of rocking stones (logans!) and a possible prop on the Isles of Scilly

Having just returned from a trip to St Martin’s on the Isles of Scilly. I thought it would be worth mentioning a couple of interesting rocks that we came across while walking around the Island. I’m always on the look out of these with my partner and enjoy finding natural erratic’s which move (logan stones), or seem to have been propped up by a smaller rock. On this visit there were two of these worth mentioning from St Martin’s and then I also came across another logan earlier in the year on Bryher, while searching for the perfect place to watch the sunset.

The St Martin’s rock which moved when stood upon is found to the northern side of Chapel Downs, a short distance away from the Day Mark and just off the well trodden pathway leading around the eastern coastline. It was positioned near the coastline and a rocky outcrop, large enough to be significant in the landscape, but on a small enough pivot that it was easy enough for one person to rock back and forth.

Rocking stone found on St Martin’s

The propped stone was a mile or so away on the Burnt Hill promontory fort, this one was spotted by my partner as I was looking at a possible entrance grave and a couple of hut circles. A large boulder had what seemed to be a natural split down the centre and one half of the rock had been propped up by a smaller boulder making a gap underneath. Whether this had happened naturally is unknown but a number of props which have had a human hand playing a part have been identified on the mainland.

The final stone worth mentioning was noticed on a trip earlier this year while visiting Bryher. Looking for a perfect place to watch a sunset, this large boulder was on the western side of Samson Hill, overlooking the entrance grave and island of Sampson. The boulder was a large and most likely natural feature about 1/3 of the way down the hill and it seemed to be the perfect spot to watch a sunset from. Climbing onboard the rock itself didn’t noticeably move, but when a second person also scrambled onto sit on the top the stone began to rock back and forth. Not only does the boulder have a great view of an entrance grave underneath it, it also has a wonderful view of the sunset, and I liked to think that people have been visiting and rocking this stone for millennia.

Some Bodmin viewing frames and propped stones

Wandering around Bodmin Moor there are a number of well known viewing frames and propped stones. Positioned on the hilltops and slopes of the better known tors a large number were identified by Roger Farnworth. Articles about aome of these appear in Meyn Mamvro issues 63 and 85. (meynmamvro.com).

Some of them appear to have an astronomical alignment such as the Leskernick Propped stone which has a summer solstice alignment. Many of these frame other hilltops and significant rocky outcrops. Here are two which have not been mentioned by Rogers in the articles.

Garrow Tor prop. Found of the western slopes of Garrow this propped stone frames Alex Tor. Initial assessment shows this to be orientated to the west and Alex Tor would be in the position of the midpoint (equinox) sunset. Prop found by Jamie Ashley.

A second prop on the southern slopes of Brown Willy. This one frames Hawks Tor to the south. There does not seem to be any obvious astronomical connection and the frame points in a just of South direction. Thanks to William Arnold for pointing this one out.

There are lots of props and framing stations to be found in both Penwith and on Bodmin Moor. Other blog posts on this site about these include; Little Galva framing station and Carn Kenidjack propped stone.