1. IOR/V/27/420/70 Reference (shelfmark): IOR/V/27/420/70 Title: India. Survey of India, Trigonometrical Branch Spirit-Levelled heights: Sections 1-9: N.W. Provinces, Oudh and Punjab 1866-72 [Lacks section 6. Includes preliminary issues of sections 1-5]. Dehra Dun, 1863-1903 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1863-1903 Extent: 1 volume