1. IOR/L/PS/18/B206 Reference (shelfmark): IOR/L/PS/18/B206 Title: Final memorandum by the British Plenipotentiary, Tibet Conference. Sir A H McMahon, Simla: Foreign and Political Dept Secret (External) Letter No 90 of 23 Jul 1914 [L/PS/10/344: 3160/14] Collection Area: India Office Records and Private Papers Languages: English Date Range: 23 Jul 1914 Extent: [48]pp 2 maps