"Baltimore County Families 1659-1759" by Robert W. Barnes.Page 578 Shipton, John, in Oct 1757 m. Mary Spear, and had iss.; JNO., b. 13 Oct 1758; and ROBERT, b. 17 Sept 1761. (131:157/r) 131=Register of St. John's Protestant Episcopal Church. Index to register made by Helen W. Brown, MHS. 157=1763 tax list of St Thomas Parish. Harford Co. Historical Society Papers, MHS.