1. IOR/F/4/1710/69064 Reference (shelfmark): IOR/F/4/1710/69064 Title: Scope & Content: Instructions issued to Lieutenant Henry Righy of the Bengal Engineers for carrying out a drainage survey of part of the town of Calcutta Collection Area: India Office Records and Private Papers Languages: English Date Range: Mar 1834-Oct 1835 Extent: 1 file