During the last years of the 19th century, the Duluth Harbor, situated between the sister cities of Duluth, Minnesota, and Superior, was the birthplace of a bold and innovative and decidedly odd-looking class of Great Lakes barges and steamships known as whalebacks. Capt. Alexander McDougall and his American Steel Barge Company built the curved-decked, snout-nosed whalebacks on the shores of the harbor, first at Duluth's Rice's Point and later in...