+--Michael Clark  (ABT. 1650-)
   +--Christopher Clark  (AFT. 1645-)
   |  +-- Margaret  (ABT. 1650-)
+--Francis Clark  (1676-1769)
|  +-- Elizabeth?  (1658-)
Francis Clark  (ABT. 1725-NOV 1799)
+--Cordelia Lankford  (1682-ABT. 1760)