1. IOR/F/4/711/19418 Reference (shelfmark): IOR/F/4/711/19418 Title: Scope & Content: Purchase of a barometer and thermometer by the Surveyor General's Office to enable Lieutenant Benjamin Swain Ward to calculate the height of the Nilgiri mountains. Collection Area: India Office Records and Private Papers Languages: English Date Range: Feb-Oct 1822 Extent: 1 file