1. IOR/E/1/25 ff. 173-175v Reference (shelfmark): IOR/E/1/25 ff. 173-175v Title: Letters 92-93 Charles Bush at the Office of Ordnance to the Court forwarding a minute made by the Board cocnerning refraction of saltpetre. Related papers attached. Collection Area: India Office Records and Private Papers Languages: English Date Range: 24 Oct 1734 Extent: 1 letter