A voyage of discovery to the north Pacific Ocean, and round the world : in which the coast of North-west America has been carefully examined and accurately surveyed ; undertaken by His Majesty's command, principally with a view to ascertain the existence of any navigable communication between the north Pacific and north Atlantic Oceans ; and performed in the years 1790, 1791, 1792, 1793, 1794 and 1795, in the Discovery sloop of war, and armed tender Chatham, under the command of Captain George Vancouver.