1. IOR/L/E/6/55, File 172 Reference (shelfmark): IOR/L/E/6/55, File 172 Title: File S&C 172/1881 - Visit of Major Waterhouse to the photographic establishments of the Portuguese Government for the purpose of studying the processes for reproducing maps Collection Area: India Office Records and Private Papers Languages: English Date Range: Feb 1869-Feb 1881 Extent: 1 file