1. IOR/L/PS/20/73 Reference (shelfmark): IOR/L/PS/20/73 Title: Report on the Chumbi Valley, including that portion of the Sikkim frontier immediately adjoining the valley. By Cpt F C Colomb, Intelligence Branch Simla: Intelligence Branch, Quarter Master General's Dept, 1896 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1896 Extent: iii, 65pp 5 maps