1. IOR/L/MIL/5/394, Coll 154 Reference (shelfmark): IOR/L/MIL/5/394, Coll 154 Title: Military Department Special Collections: Collection 154 Scope & Content: Copy Bengal correspondence on the encouragement of geological and mineralogical research Collection Area: India Office Records and Private Papers Languages: English Date Range: 1821-1829 Extent: 1 file