 After the War's end, Roosevelt returned to New York.While in Esopus, he had made a small wooden boat, across which was an axle projecting over the sides with paddles at the ends, made to revolve by a tight cord wound around its middle by the reaction of hickory and whalebone springs.Back in New York City, he engaged in manufacturing, and became interested in the Schuyler Copper Mine in North Arlington, New Jersey on the Passaic River.