1. IOR/L/PS/11/162, P 550/1919 Reference (shelfmark): IOR/L/PS/11/162, P 550/1919 Title: P 550/1919 Services of the North Channel (Thames) Provisional Pilots and Admiralty Deep Sea Pilots after the War Collection Area: India Office Records and Private Papers Languages: English Date Range: 20 Dec 1918-5 Feb 1919 Extent: 1 file