1. IOR/L/PS/11/216, P 2474/1922 Reference (shelfmark): IOR/L/PS/11/216, P 2474/1922 Title: P 2474/1922 Report on the operations of the Royal Survey Department of the Siamese Army 1919-20 Collection Area: India Office Records and Private Papers Languages: English Date Range: 8 Jun 1922 Extent: 1 file