1. A group of four tabular limestone blocks, associated with a possible mound. Excavation, 1936 (Daniels 1937) suggested that the stones constituted a natural feature, although a handaxe was recovered.
(source Os495card; ST07SE12)

2. Entry from RCAHMW Glamorgan Inventory 1976, 40.

(45) Burial Chamber, Coed-y-cwm, at about 100m above O.D. on a low ridge overlooking a tributary stream of the R. Waycock on the S. Four slabs of tabular limestone lie on the ridge in a position not accepted as natural when it was suggested in 1935 that they could represent a ruined or unfinished cromlech, sited at the E end of a much denuded long barrow. The largest slab is 3.0m long E-W. by 1.4m by 05m thick, but the others are barely one quartr as large in area and half as thick.

Excavations in 1936 showed them to lie on a natural gravel formation in which no trace of sockets could be found. A polished flint axe was found beneath the surface about half a metre E of the stones. The ridge was interpreted as natural in a cutting 6m W of the stones, but this may have been the unweathered surface beneath a vestigial long mound which was formerly detectable by levelling; furthermore, the stones are unlikely to have reached their present position through natural agency.

3. There are some similarities to the sub-megalithic site on Skomer Island (NPRN 414608), which comprises an isolated earthfast slab and two low orthostats nearby. See Sketchfab model: https://skfb.ly/pxP8I

Updated by Dr Toby Driver, RCAHMW, June 2025

References:

Daniel, G. E. 1937. Archaeologia Cambrensis, pp. 287-93

Daniel, G. E. 1936. Proceedings of the Prehistoric Society,  p. 226.

RCAHMW 1976. An Inventory of the Ancient Monuments in Glamorgan. Volume 1: Pre-Norman. Part 1: The Stone and Bronze Ages. HMSO,