1. IOR/L/PS/11/173, P 4426(1)/1920 Reference (shelfmark): IOR/L/PS/11/173, P 4426(1)/1920 Title: P 4426(1)/1920 North-West Frontier: Special Intelligence Bureau at Peshawar; extension of sanctioned period to 31 Mar 1922 Collection Area: India Office Records and Private Papers Languages: English Date Range: 6 Dec 1919-4 Jul 1920 Extent: 1 file