_____________________
                                                            |                     
                            _Phillip LEIDY _________________|
                           |                                |
                           |                                |_____________________
                           |                                                      
 _C. Fontaine LEIDY _______|
|                          |
|                          |                                 _Robert J. W. POLK __+
|                          |                                |                     
|                          |_Penelope Johnstone Maury POLK _|
|                                                           |
|                                                           |_Fnu SOMMERVILLE ____
|                                                                                 
|
|--Helen West LEIDY 
|  
|                                                            _____________________
|                                                           |                     
|                           ________________________________|
|                          |                                |
|                          |                                |_____________________
|                          |                                                      
|_Margaret Howard RIDGELY _|
                           |
                           |                                 _____________________
                           |                                |                     
                           |________________________________|
                                                            |
                                                            |_____________________