_____________________
                                            |                     
                       _Josiah FERGUSON ____|
                      | (1725 - 1803)       |
                      |                     |_____________________
                      |                                           
 _William FERGUSON ___|
| (1754 - 1839)       |
|                     |                      _____________________
|                     |                     |                     
|                     |_Thorton of UNKNOWN _|
|                       (1729 - 1769)       |
|                                           |_____________________
|                                                                 
|
|--Mary FERGUSON 
|  (1798 - ....)
|                                            _Joseph LEMASTER ____+
|                                           | (1693 - 1730)       
|                      _Isaac LEMASTERS ____|
|                     | (1728 - 1797)       |
|                     |                     |_Catherine WARD _____+
|                     |                       (1695 - 1730)       
|_Catherine LEMASTER _|
  (1754 - 1842)       |
                      |                      _____________________
                      |                     |                     
                      |_Ann SCOTT __________|
                        (1732 - 1810)       |
                                            |_____________________