I noticed you started this thread a long time ago but please see photo i took of Cerrig Cynrig 2 years ago. Cerrig has also been known as cerrig-cyn-rhyg and in 1840 it was owned by Sir John Hay Williams and rented to the Roberts family. From the 1840 tithe map and schedule they owned 11 fields consisting of 80 acres, the neighboring farms were also owed by the same people who restored Bodelwyddan castle. I do have more information - I am a neighbour.