1. IOR/L/E/7/1331, File 535 Reference (shelfmark): IOR/L/E/7/1331, File 535 Title: File 535 Opium - Control of traffic in British ships between the Persian Gulf and the Far East: as to issue of King's regulations Collection Area: India Office Records and Private Papers Languages: English Date Range: 19 Jan 1923-28 Sep 1931 Extent: 1 file