1. IOR/L/PS/11/57, P 2580/1913 Reference (shelfmark): IOR/L/PS/11/57, P 2580/1913 Title: P 2580/1913 North-East Frontier: Dihang river survey party; progress report 16 Mar-30 Apr; Dibong river survey party; diary May 1-15 Collection Area: India Office Records and Private Papers Languages: English Date Range: 31 Mar 1913-15 May 1913 Extent: 1 file