1. IOR/V/23/4, No 22 Reference (shelfmark): IOR/V/23/4, No 22 Title: Official correspondence on the subject of attaching lightning conductors to powder magazines. Calcutta: Calcutta Gazette Office, 1857 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1857 Extent: [xiv], v, 105, xiip, plan