1. IOR/L/MIL/7/13642 Reference (shelfmark): IOR/L/MIL/7/13642 Title: Collection 309/18 Ventilation of pits for disappearing guns at Aden; lowering of the guns; air pumps for charging cylinders. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1890-1895 Extent: 1 file