The Delaware Public Archives will be closed Monday, May 26, in observance of Memorial Day. Normal business hours will resume on Tuesday, May 27.
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Created from the difficulty in surveying the twelve-mile circle tangent point and the Tangent Line defined by Charles Mason and Jeremiah Dixon, this land between the State of Maryland and the Delaware curve is a wedge-shaped tract that was claimed by Pennsylvania but governed by Delaware for more than a century. A joint commission appointed in 1889 from both states awarded it to Delaware. This decision was ratified by Pennsylvania in 1897, with Delaware and the United States Congress following suit in 1921.
Installed in 1932. Reinstalled in 2023.
Historic Markers Commission, 1932.
State of Delaware Historic Markers Program, 2023.
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