1. IOR/L/PS/11/54, P 2067/1913 Reference (shelfmark): IOR/L/PS/11/54, P 2067/1913 Title: P 2067/1913 North-East Frontier: survey of the Siyom valley (western tributary of the Dihong) in the Abor country Collection Area: India Office Records and Private Papers Languages: English Date Range: 25 Jan 1913-6 Apr 1913 Extent: 1 file