1. IOR/F/4/1334/52853 Reference (shelfmark): IOR/F/4/1334/52853 Title: Scope & Content: Invention by Captain James William Douglas, Assistant Opium Agent in Malwa, of a more efficient scale for weighing opium. Collection Area: India Office Records and Private Papers Languages: English Date Range: Feb-Oct 1830 Extent: 1 file