The file comprises a card index covering descriptions of mountains, geology, climate, alpine plants, other flora, ferns and trees, the uplands of Snowdonia, Cader Idris, Plynlimon and South Wales, animal life, bibliography and notes taken from literary sources, 1948-1980. Some of the entries are accompanied by more detailed notes, sketches, pamphlets and correspondence including letters from Peter [Benoit], 1979, Evan Price Evans, 1955-1958, Derek Ratcliffe, 1973, on peregrine falcons, and Irene ('Benjamin') Vaughan, post-1971, mainly concerning mountain plants.