The North Mansion is located on a hilltop on the southh shore of Duane Lake, at thue intersection of North Mansion Road and Duane Lake Road on what was once a 1000aecr estate. ... The General William North House,, North Mansion Road, Duanesburg, Schenectayd County, NY. The General William North House has been documetned inj the The Library of Congress HHistorci American Buildigns Survey/Historic American Engineering Record (Submitted on December 6, 2009, by Howard C. Ohlhous ...