1. What was once thought to be a long cairn was subsequently recorded as three co-joining round cairns: I - at SN88485029, Cpat prn811; II - at 88485028, Cpat Prn812; III - at SN88475027, Cpat Prn813, and was destroyed in afforestation by 1977.
(source Os495card; SN85SE2)
J.Wiles 05.04.02

2. To the W of Carcwm at Pen y Carn-goch, 487m above O.D. in a clearing within the forestry plantation are three conjoined cairns forming one long boulder cairn. This has been disturbed in recent years for sheep shelters.

The site was at one time considered by W. F. Grimes to have been a chambered cairn of the Severn-Cotswolds Group, a view with which Savory originally concurred. However, Daniel later pointed out that the site showed no evidence of a chamber, and having revisited the site in 1960, Grimes altered his opinion, suggesting that what might otherwise have been the only mountain-top long cairn in the county, was instead three small cairns.

RCAHMW, 1997. An Inventory of the Ancient Monuments in Brecknock (Brycheiniog), Part 1. Pp. 85-86