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Gilbert and Samuel McKown House, also known as "Marshy Dell", is a historic home located near Gerrardstown, Berkeley County, West Virginia. It is a large two story, four bay wide log dwelling. The eastern section of the house was built by Gilbert McKown about 1774; the other section was added by his son Samuel about 1810. Also on the property is a 1+1⁄2-story stone outbuilding.
Marshy Dell was listed on the National Register of Historic Places in 1984.