The male figure is said to possibly be Civil War hero and former lighthouse keeper William A. Harn.
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Volunteers from Northrop Grumman Corporation and Florida Power & Light clean and inspect the lens and works every week.
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In April 2010, a partnership between the Mount Vernon Archaeology Department, the Lighthouse Archaeological Maritime Program, the Institute of Maritime History, the Maryland Historical Trust, and the Virginia Department of Historic Resources conducted an archaeological survey of the Potomac River near Mount Vernon.