3493131 Butler\'s Lookout Tower, Opposite Dutch Gap, 1865 (albumen silver print from glass negative) by Russell, Andrew Joseph (1830-1902); Metropolitan Museum of Art, New York, USA; (add.info.: formerly attributed to Matthew Brady Dutch Gap is located on the James River in Chesterfield County, Virginia; it was started as a canal by Union forces during the American Civil War to cut off a curl of the river controlled by Confederate forts.).