1. IOR/L/PS/10/777 Reference (shelfmark): IOR/L/PS/10/777 Title: File 5692/1918 Pt 1 Northern Frontier: exploration of Mt Everest; Royal Geographical Society's proposed mission; expeditions of 1921 and 1922 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1918-1924 Extent: 1 file / part file