_____________________ | _James FORBES-ROBERTSON _| | (1828 - ....) m 1866 | | |_____________________ | _Gordon FORBES-ROBERTSON _| | (1862 - 1943) m 1887 | | | _Thomas COBB ________+ | | | (1796 - 1892) m 1836 | |_Harriet F. COBB ________| | (1838 - ....) m 1866 | | |_Elizabeth GREEN ____ | (1801 - 1881) m 1836 | |--Duncan ROBERTSON | (1893 - ....) | _____________________ | | | _________________________| | | | | | |_____________________ | | |_Blanche CHALLENGER ______| (1863 - 1935) m 1887 | | _____________________ | | |_________________________| | |_____________________