NW Passage puzzle unlocked by McClure and the Investigator

THIS striking image below, ‘Critical Position of HMS Investigator on the North Coast of Baring Island’, is one regularly used when copies of Samuel Gurney Cresswell’s A Series of Eight Sketches… of the H.M.S. Investigator, Capt. M’Clure, during the Discovery of the North West Passage, a large atlas folio issued in 1854, come to auction.