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Trethevy Quoit

A clean slate? (or should that be granite?)

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Sanctuary S
Sanctuary May 6, 2011 11:25:07
Replying to StoneGloves

StoneGloves wrote:
Yes, that last photograph supports what I was suggesting was the method that was used to place the cap. The shallow socket would have located the big stone as it was swung around. A monumental feat. Nice to see the workings out. It's certainly moving...
This is the last pic I will show as to 'reveal all' just defeats the object of writing about it with a view to publishing. Here is a clearer view (and I have better ones) showing the knib again. We are on the same wavelength here SG as that is my belief also. If a shallow socket as described was made and the knib used as an aid to line up the capstone, then that would explain why the capstone at that point has broken away underneath as clearly seen from underneath the 'hole'. This would have happened as the sheer weight of the cap began to slip. No mystery attached, pure old-fashioned common sense!

http://i26.servimg.com/u/f26/16/16/85/69/s8002311.jpg

N nigelswift
nigelswift May 6, 2011 12:20:34
Replying to Sanctuary

Oooh, are you two talking mortise and tenon, a forerunner to Stonehenge. Now you're motoring!

S StoneGloves
StoneGloves May 6, 2011 13:13:39
Replying to Sanctuary

That's also a very similat technical solution to the trilithons, at Stonehenge, so one might argue that those two structures were of a similar date.

T thesweetcheat
thesweetcheat May 6, 2011 13:53:57
Replying to Sanctuary

Sanctuary wrote:
This is the last pic I will show as to 'reveal all' just defeats the object of writing about it with a view to publishing. Here is a clearer view (and I have better ones) showing the knib again. We are on the same wavelength here SG as that is my belief also. If a shallow socket as described was made and the knib used as an aid to line up the capstone, then that would explain why the capstone at that point has broken away underneath as clearly seen from underneath the 'hole'. This would have happened as the sheer weight of the cap began to slip. No mystery attached, pure old-fashioned common sense!

http://i26.servimg.com/u/f26/16/16/85/69/s8002311.jpg

Sanctuary,

I have to confess to having drifted off during the ever-lengthening series of Trethevy threads, so apologies for that. But this latest bit makes a lot of sense, so thanks for re-awakening my interest.

The ongoing shifting is pretty scary though. Be interesting to know how the people who are planning on re-erecting Carwynnen (spelling?) are planning on ensuring its stability.

T tiompan
tiompan May 6, 2011 14:02:38
Replying to Sanctuary

Sanctuary wrote:
StoneGloves wrote:
Yes, that last photograph supports what I was suggesting was the method that was used to place the cap. The shallow socket would have located the big stone as it was swung around. A monumental feat. Nice to see the workings out. It's certainly moving...
This is the last pic I will show as to 'reveal all' just defeats the object of writing about it with a view to publishing. Here is a clearer view (and I have better ones) showing the knib again. We are on the same wavelength here SG as that is my belief also. If a shallow socket as described was made and the knib used as an aid to line up the capstone, then that would explain why the capstone at that point has broken away underneath as clearly seen from underneath the 'hole'. This would have happened as the sheer weight of the cap began to slip. No mystery attached, pure old-fashioned common sense!

http://i26.servimg.com/u/f26/16/16/85/69/s8002311.jpg

Interesting pics Roy . Tatjana Kytmannow makes the interesting point that Trethevy and Harristown are the only surviving portal tombs with with very high portal stones that have not collapsed .