Climbing journal of Peter Frederick Oliver of an expedition to Gahrwal in the Kunmaon Himalayas during which Oliver failed in an attempt to climb Dunagiri but later made the second known ascent of Trisul., May-July 1933., MS.24662. Correspondence, diaries, literary papers, and photographs, of Lieutenant-Colonel Peter Roderick Oliver, 1921-1944, together with diaries and miscellaneous papers of his mother, Elizabeth Oliver, wife of Major Edward Oliver, Veterinary Advisor to the Indian government, 1905-1946, undated., MSS.24656-24720. National Library of Scotland Archives and Manuscripts Division. https://manuscripts.nls.uk/repositories/2/archival_objects/45646 Accessed May 10, 2024.