Two cairns on Mynydd Llangeinwyr, Coflein/GGAT descriptions:
Southern cairn (SS9197090610)
An oval stony mound, 7.6m E-W by 6.1m and 0.3m high.
Entirely grass-covered and roughly flat-topped mound, slightly dished in from the edges; stone can be detected in the interior so it is unlikely to be a ring cairn, unless the centre was later filled. Sheep track runs across monument N-S, and appears to have dug into it slightly.
Northern cairn (SS9198291967)
This low circular cairn measures 6 metres in diameter, and is up to 0.5 metres high. It is covered with bilberry and grass.
The northern cairn is not marked on the OS map.