The remains of a basin measuring approx. 1.8m in diameter and 0.9m front to back, which was originally the spring, is backed by a semi-circular revetment of dry-built masonry measuring approx. 0.9m at its highest. The front of the basin is closed by a low straight sill of slabs. It is associated with St Tudwens Church, although it is in Llaniestyn parish.
(Source: Inventory of the Ancient Monuments in Caernarvonshire, Vol. III (RCAHMW: 1964)
