 Mapping this corner of Lake Huron was a challenge given that little was known about the shores and depths of the channels between the islands.The agent for the United States survey team, Major Joseph Delafield, complained, "No map that I have seen has any truth as it respects the position of Drummond's or the other islands about St. Marys.We entered this bay without a pilot, but are told we cannot proceed up river without one."