Tregiffian - cup mark under capstone

Underneath the repaired capstone of Tregiffian burial chamber in West Penwith, Cornwall, UK, is a large cup mark. It is possible that this was at one point an attempt to drill a hole through the stone, as it matches a cup mark of similar size directly above. It is about 25cm in diameter. This cup mark is bisected by a repaired split in the stone, and again by a steel supporting girder inserted after the Tregiffian excavation (and reconstruction) in 1968. Note that this cup mark was scanned in a very confined space, on the 'ceiling' of the tomb. The spider on the model shows something of the conditions at the time of scanning! A hanging spider nest was left undisturbed and had to be removed from the model. [View a complete 3D scan of Tregiffian burial chamber](https://sketchfab.com/3d-models/tregiffian-burial-chamber-cornwall-uk-1b6d39159c844ea5b24d869508fa3fd9) and see this cup mark in-situ. *The project was funded by a British Academy/Leverhulme small research grant.* Source: Objaverse 1.0 / Sketchfab