The Reginald Farrer collection comprises correspondence between Reginald Farrer and his family (his mother in particular), E.A. Bowles, John Buchan, Sir Francis Younghusband, Ernest Gye, Sir Isaac Bayley Balfour and others as detailed below. It also includes paintings, photographs, 35mm slides, glass plate negatives and lantern slides covering mainly his two plant collecting expeditions to China in 1914-15 and Burma in 1919-1920, as well as scripts for plays written by Farrer.