_Harrison ROBERTSON ______
                                                     | (1822 - 1908) m 1850     
                               _Harrison ROBERTSON __|
                              | (1865 - 1938)        |
                              |                      |_Eliza Clarkson MARSHALL _+
                              |                        (1827 - 1868) m 1850     
 _Harison Marshall ROBERTSON _|
| (1892 - 1958) m 1917        |
|                             |                       __________________________
|                             |                      |                          
|                             |_Mary Longley VAWTER _|
|                               (1867 - 1944)        |
|                                                    |__________________________
|                                                                               
|
|--Mary Bowie ROBERTSON 
|  (1929 - 2016)
|                                                     __________________________
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|                              ______________________|
|                             |                      |
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|                             |                                                 
|_Mary MACKENZIE _____________|
  (1897 - ....) m 1917        |
                              |                       __________________________
                              |                      |                          
                              |______________________|
                                                     |
                                                     |__________________________