In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Mamhilad like this:
MAMHILAD, a parish in Pontypool district, Mommouth; on the Brecon canal, adjacent to the Abergav enny and Pontypool railway, 3 miles NE of Pontypool. It has a post office under Pontypool. Acres, 1.,987. Real property, £1,964. Pop. in 1851,297; in 1861 339. Houses, 65. The property is much divided The living is a vicarage in the diocese of Llandaff. Value, £160.* Patrons, the Dean and Chapter of Llandaff. The church is good.
A Vision of Britain through Time includes a large library of local statistics for administrative units. For the best overall sense of how the area containing Mamhilad has changed, please see our redistricted information for the modern district of Monmouthshire. More detailed statistical data are available under Units and statistics, which includes both administrative units covering Mamhilad and units named after it.
GB Historical GIS / University of Portsmouth, History of Mamhilad in Monmouthshire | Map and description, A Vision of Britain through Time.
Date accessed: 30th May 2016
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Mamhilad".