From Historic Graves of Maryland, p. 142:
Mary married John Cockey, son of Lt. John Cockey [son of Thomas] and Mary Coale. (John Cockey was born on 5 Nov 1788, died on 4 May 1873 and was buried in Sater's Baptist Historical Church Cemetery, Timonium, Baltimore, Maryland, United States.)
1 Ridgely, Helen W, Historic Graves of Maryland and the District of Columbia (New York: The Grafton Press, 1908.), p. 142.