1. IOR/L/MIL/17/8/500 Reference (shelfmark): IOR/L/MIL/17/8/500 Title: Instructions on defence matters and rules for the recognition and entry of H.M. ships into British defended ports at home and abroad, 1912. Admiralty WS, Operations Div, Mar 1912. Scope & Content: Secret Collection Area: India Office Records and Private Papers Languages: English Date Range: 1912 Extent: 92p, 24cm