1. IOR/F/4/1902/81153 Reference (shelfmark): IOR/F/4/1902/81153 Title: Scope & Content: Further proceedings regarding the progress of the Great Trigonometrical Survey - questions regarding the remaining operations required for the completion of the Survey, etc Collection Area: India Office Records and Private Papers Languages: English Date Range: May 1840-May 1841 Extent: 1 file