1. IOR/L/PS/11/232, P 1638/1923 Reference (shelfmark): IOR/L/PS/11/232, P 1638/1923 Title: P 1638/1923 Tibet: British Post Offices Collection Area: India Office Records and Private Papers Languages: English Date Range: 12 Feb 1923-1 Jan 1925 Extent: 1 file