1. IOR/L/MIL/5/407, Coll 263 Reference (shelfmark): IOR/L/MIL/5/407, Coll 263 Title: Military Department Special Collections: Collection 263 Scope & Content: Copy memorandum by N.B. Edmonstone on the Great Trigonemtrical Survey of India Collection Area: India Office Records and Private Papers Languages: English Date Range: 1827 Extent: 1 file