"MAES-Y-CWMMER is a hamlet of the parish of Bedwas, 4½ miles north, and partly included in the ecclesiastical parish of Mynyddysluyn, and has a chapel of ease of stone, consisting of chancel, nave, porch and a bell turret, containing one bell: there are 200 sittings. The Rev. J.A. Williams is curate-in-charge. Here are Baptist, Welsh Congregational and Calvinistic Methodist chapels."
[Description(s) from Kelly's Directory of Monmouthshire & S Wales, 1895]
Kain, R.J.P., Oliver, R.R., Historic Parishes of England and Wales: an Electronic Map of Boundaries before 1850 with a Gazetteer and Metadata [computer file]. Colchester, Essex: History Data Service, UK Data Archive [distributor], 17 May 2001. SN: 4348. Here is a gazetteer/finding aid plus a set of overview maps to accurately identify the position of parishes within the county.
You can see maps centred on OS grid reference ST155945 (Lat/Lon: 51.642883, -3.222602), Maesycwmmer which are provided by: