"Radnorshire, inland co. of South Wales; N. and S., 30 miles; greatest
breadth, E. and W., 34 miles; area, 276,552 ac., pop. 23,528. Radnorshire
is the smallest of the 6 counties of South Wales. In the E. and S. are some
comparatively level tracts, including the Vale of Radnor, but the greater
portion of the surface is hilly, or even mountainous, the Forest of Radnor
reaching in its highest summit an elevation of 2163 ft."
from John Bartholomew's Gazetteer of the British Isles 1887