1. IOR/L/PS/20/286 Reference (shelfmark): IOR/L/PS/20/286 Title: Report by Brigadier-General G Pereira on his journey from Peking to Lhasa during 1921 and 1922 Calcutta, 1923 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1923 Extent: 42 p; maps