National Geographic : 1942 Dec
Captain F.M.Munger, U.S.Coast Guard Coast Guard Officers Go Ashore to Survey the Strangest Island in the World-Bogoslof Volcano Here, in June, 1906, they stand before Perry Peak (named for their revenue cutter), which had popped up from the submerged crater several months before. During the following winter another rock, McCulloch, 495 feet high, appeared close to Perry. About September 1, 1907, McCulloch suddenly vanished, probably causing the dense black cloud which floated over Unalaska Island 40 miles away, covering the land with ashes. Later Perry Peak,too, disappeared.