1. IOR/F/4/1704/68871 Reference (shelfmark): IOR/F/4/1704/68871 Title: Scope & Content: Invention by Lieutenant Thomas Cook RN, Assistant Professor of Fortification at Addiscombe Military Seminary of a 'portable telescope boat' to be used as a pontoon bridge by troops and artillery - correspondence regarding the same Collection Area: India Office Records and Private Papers Languages: English Date Range: Aug 1838 Extent: 1 file