Pantglas and Pantglas Bach are two farms that share the same yard. The first and second editions of the 25 inch OS maps, published in 1889 and 1901, do not show a Pantglas Bach at all, probably indicating that they were part of the same farm at the turn of the twentieth century. Pantglas farm is located approximately five and a half miles south east of Trawsfynydd.
M. Ryder, RCAHMW, 4th October 2018.