1. Remains of a stone built cairn on the summit of Craig Cwm Silyn. Roughly circular on plan and measuring about 8.5m in diameter and up to 2m in height. A modern walker's shelter has been constructed within its summit.
Source: Cadw Scheduling description.
F.Foster/RCAHMW 20.12.2005

2. Site is included in an upland survey conducted in 2006. See survey report Nantlle Beddgelert (South), by M.J. Roseveare, ArchaeoPhysica Ltd.
C.H. Nicholas, RCAHMW, 14th December 2006.