__________________________
                                                    |                          
                              _Sylvester BLACKWELL _|
                             | (1811 - 1888)        |
                             |                      |__________________________
                             |                                                 
 _Joel H. BLACKWELL _________|
| (1843 - 1923) m 1866       |
|                            |                       __________________________
|                            |                      |                          
|                            |_Martha GRIGG ________|
|                              (1814 - 1876)        |
|                                                   |__________________________
|                                                                              
|
|--William BLACKWELL 
|  (1868 - ....)
|                                                    _Mathias FIRESTONE Sr.____+
|                                                   | (1777 - 1850) m 1798     
|                             _John FIRESTONE ______|
|                            | (1815 - 1887) m 1837 |
|                            |                      |_Mary HILL _______________+
|                            |                        (1773 - 1836) m 1798     
|_Sarah Elizabeth FIRESTONE _|
  (1844 - 1914) m 1866       |
                             |                       _James Arrington PROPHET _
                             |                      | (1794 - 1885) m 1816     
                             |_Delana PROPHET ______|
                               (1817 - 1893) m 1837 |
                                                    |_Jemima BINGHAM __________
                                                      (1798 - 1881) m 1816