I was looking at the District County Lunatic Asylum on 1901 census on Ancestry, Glamorgan, Higher Coity and noted that it was situated at Parc Gwyllt, Coity, Bridgend; noted also that it was in the ecclesiastical parish of "Coity,with Nolton, St Mary (part of)"... perhaps it was not Nolton St, but Nolton, St Mary... I haven't found it on the 1911 census yet.