I. Fifty photographs of maps of American rivers.--II. Fifty photographs of maps of forts and other military maps and plans in the southern states, western Pennsylvania, and New York. 1905.--III. Fifty-three photographs of maps of forts and fortifications of the Niagara frontier, Hudson Valley and Lakes George and Champlain, 1907.--IV. Thirty-six photographs of maps and forts and fortifications of Lake Champlain, eastern New York and New England, and twenty-four photographs of Simcoe views of the Niagara frontier. 1908.--V. Fifty photographs of maps of the region between the St. Lawrence and the Mississippi Rivers, including the Lower Canadian provinces, the New England states, New York, the larger cities of the east. 1908.