In 1887, John Bartholomew's Gazetteer of the British Isles described Beaumaris like this:
Beaumaris, mun. bor. and par., seaport town, and watering-place, Anglesey, on the Menai Strait, near its junction with the Irish Sea, 7 miles NE. of Bangor and 238 miles NW. of London -- par., 1220 ac., pop. 1907; bor., 3159 ac., pop. 2239; P.O., T.O., 1 Bank. There are ruins of a castle built by Edward I., and garrisoned (1643-1646) for Charles I. The harbour is very commodious. (For shipping statistics, see Appendix.) Beaumaris united with Amlwch, Holyhead, and Llangefni in sending 1 member to Parliament till 1885.
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 Beaumaris has changed, please see our redistricted information for the modern district of the Isle of Anglesey. More detailed statistical data are available under Units and statistics, which includes both administrative units covering Beaumaris and units named after it.
GB Historical GIS / University of Portsmouth, History of Beaumaris in The the Isle of Anglesey | Map and description, A Vision of Britain through Time.
Date accessed: 10th October 2015
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Beaumaris".