1. IOR/L/MIL/5/397, Coll 170a Reference (shelfmark): IOR/L/MIL/5/397, Coll 170a Title: Military Department Special Collections: Collection 170a Scope & Content: Original and copy correspondence and committee minutes on Aitchison's Code Collection Area: India Office Records and Private Papers Languages: English Date Range: 1831-1833 Extent: 1 file