1. IOR/V/27/420/68 Reference (shelfmark): IOR/V/27/420/68 Title: India. Survey of India, Trigonometrical Branch Spirit-Levelled heights: Tables of heights in Sind, the Punjab, N.W. Provinces and Central India... to May 1862. Dehra Dun, 1863-1903 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1863-1903 Extent: 1 volume