During the American Revolution, Robert Erskine managed ironmaking operations from Ringwood, and became George Washington's first geographer and Surveyor-General, producing maps for the Continental army; Washington visited the Manor House several times.
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Skylands Manor, a forty-four-room English Jacobean mansion, was designed in the 1920s by John Russell Pope for Clarence McKensie Lewis, a wealthy stockbroker and civil engineer.
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He established an estate in Ringwood, New Jersey from farm in the Ramapo Mountains that would become the New Jersey State Botanical Gardens in Ringwood State Park.