_____________________
                                                        |                     
                              _James Anderson MITCHELL _|
                             | (1825 - 1896) m 1847     |
                             |                          |_____________________
                             |                                                
 _William Franklin MITCHELL _|
| (1860 - 1941)              |
|                            |                           _Rowland COBB _______+
|                            |                          | (1796 - 1867) m 1817
|                            |_Harriet A. COBB _________|
|                              (1830 - 1879) m 1847     |
|                                                       |_Mary Ann EDWARDS ___+
|                                                         (1803 - 1889) m 1817
|
|--William MITCHELL 
|  (1907 - ....)
|                                                        _____________________
|                                                       |                     
|                             _David ROYCE _____________|
|                            | (1821 - ....)            |
|                            |                          |_____________________
|                            |                                                
|_Clara ROYCE _______________|
  (1871 - ....)              |
                             |                           _____________________
                             |                          |                     
                             |__________________________|
                                                        |
                                                        |_____________________