“About a mile from the church, on a farm called Bachwen, is a cromlech, remarkable for its large superincumbent stone, which has numerous small holes on its surface and two large ones, and for having four instead of three supporters.”
The National Gazetteer of Great Britain and Ireland (1868)
I suppose these holes must be the cupmarks to which Kammer refers in his post. Coflein says there are about 110 cupmarks on the upper surface of the capstone, and a further eight on its East face.
But as no-one’s mentioned the stone below, I suppose it must have met its fate at some point.
“In a field at Bachwen is a very large cromlech, and near it an upright stone, about nine feet high. ”
A Topographical Dictionary of Wales
Samuel Lewis, 1833
(I found these on the Genuki website here:
genuki.org.uk/big/wal/CAE/ClynnogVawr/Gaz1868.html )