On May 4, 1881, through the courtesy of the Chief of Revenue Marine, Mr. . Clark, I was allowed to take passage from San Francisco, Cal., on board the United States Revenue steamer Corwin, whose destination was Alaska and the northwest Arctic ocean. The object of the cruise was, in addition to revenue duty, to ascertain the fate of two missing whalers and, if possible, to communicate with the Arctic exploring yacht Jeannette. Our well-found craft made good headway for seven or eight uneventful days of exceptionally fine weather, while the ocean, somewhat deserving the adjective that designates it, displayed its prettiest combinations of blue tints and.