_____________________
                                                   |                     
                              _____________________|
                             |                     |
                             |                     |_____________________
                             |                                           
 _Peter JARVIS ______________|
| (1778 - 1861) m 1810       |
|                            |                      _____________________
|                            |                     |                     
|                            |_____________________|
|                                                  |
|                                                  |_____________________
|                                                                        
|
|--Jackson JARVIS 
|  (1819 - 1894)
|                                                   _Ambrose COBB _______+
|                                                  | (1729 - 1797)       
|                             _Ambrose COBB _______|
|                            | (1761 - 1824) m 1783|
|                            |                     |_Sarah HOWELL _______
|                            |                       (1734 - 1815)       
|_Mary Elizabeth Polly COBB _|
  (1786 - 1840) m 1810       |
                             |                      _Thomas BLACK _______
                             |                     | (.... - 1779) m 1765
                             |_Rachel BLACK _______|
                               (1765 - 1854) m 1783|
                                                   |_Elizabeth LNU ______
                                                      m 1765