1. IOR/L/PS/6/117, ff 6-7 Reference (shelfmark): IOR/L/PS/6/117, ff 6-7 Title: Political No. 48 of 1874, Forwarding a Copy of a Letter from the Superintendent of the Great Trigonometrical Survey of India, Regarding the Exploration of the Routes and Passes Leading into Thibet [Tibet] and Bengal Collection Area: India Office Records and Private Papers Languages: English Date Range: 6 Mar 1874-30 Mar 1874 Extent: 1 item