1. IOR/L/PS/20/239 Reference (shelfmark): IOR/L/PS/20/239 Title: Sikkim. Compiled by Maj A J Pearson, Assistant Quarter Master General, Presidency District in 1883 and brought up to date by Col E T Thackeray, RE Simla: Intelligence Branch, Quarter Master General's Dept, 1888 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1888 Extent: vii, 140pp 4 maps (2 in pocket) 2 illus