1. IOR/F/4/1872/79615 Reference (shelfmark): IOR/F/4/1872/79615 Title: Scope & Content: Papers regarding the Great Trigonometrical Survey - arrangements proposed by the Surveyor General and sanctioned by the Government of India with respect to the several series of the Great Arc Collection Area: India Office Records and Private Papers Languages: English Date Range: Aug 1839-May 1840 Extent: 1 file