1. IOR/F/4/603/14495 Reference (shelfmark): IOR/F/4/603/14495 Title: Scope & Content: Experimental construction of a line of semaphore telegraphs between Calcutta and Chunar (includes a copy of Captain George Swiney's 'Memoir on Telegraphic Communication', with illustrations, pp 99-153) Collection Area: India Office Records and Private Papers Languages: English Date Range: Sep 1817-Aug 1819 Extent: 1 file