1. IOR/L/E/6/48, File 1108 Reference (shelfmark): IOR/L/E/6/48, File 1108 Title: File S&C 1108/1880 - Letter from the Science and Art Department, London, dated 17th September 1880, regarding experimental work being carried out for the proposed improvement to the photoheliograph where it is necessary to alter the camera Collection Area: India Office Records and Private Papers Languages: English Date Range: Oct 1880 Extent: 1 file (1 folio)