1. IOR/F/4/1275/51196 Reference (shelfmark): IOR/F/4/1275/51196 Title: Scope & Content: Papers regarding the trigonometrical survey carried out by Joseph Olliver in Bihar and Bengal - the survey reaches Gopalnagar about 56 miles from Calcutta, etc. Collection Area: India Office Records and Private Papers Languages: English Date Range: Mar-Sep 1830 Extent: 1 file