In 1793, Captain James Colnett of the Royal Navy in the merchant ship Rattler undertook a survey of the Galapagos Islands. Colnett was on an extended voyage to the Pacific that he chronicled in a book published in 1798 under the lengthy title A voyage to the south Atlantic and round cape Horn into the Pacific Ocean, for the purpose of extending the spermaceti whale fisheries, and other objects of commerce, by ascertaining the ports, bays, harbours, and anchoring births in certain islands and coasts in those seas at which the ships of the British merchants might be refitted. This map, published in 1798 by the famous London map-maker Aaron Arrowsmith, traces the route of the Rattler and is the first accurate navigation chart of the islands. The Galapagos Islands are a province of Ecuador.