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Harry Hartman lost his job in 1932 and decided to use his down time to build a fishpond in his backyard. He enjoyed it so much, he kept building things for the rest of his life, including a replica of Mt. Vernon, Independence Hall, a castle, a cathedral, Noah’s Ark, a Death Valley Diorama and much, much more. See http://www.hartmanrockgarden.org/index.html for details