1. IOR/F/4/750/20518 Reference (shelfmark): IOR/F/4/750/20518 Title: Scope & Content: Papers regarding the Trigonometrical Survey of India - death of the Superintendent, Lieut Colonel William Lambton on 20 Jan 1823 - the Revenue Branch to continue as part of the Territorial Department etc. Vol 4. Collection Area: India Office Records and Private Papers Languages: English Date Range: Jul 1822-Jul 1823 Extent: 1 file