His father , Robert Gamble Cabell II ( 1847 â `` 1922 ) , was a physician . His mother , Anne Harris ( 1859 â `` 1915 ) , was the daughter of Col. and Mrs James R. Branch . His father , Robert Gamble Cabell II ( 1847 -- 1922 ) , was a physician , and his mother , Anne Harris ( 1859 -- 1915 ) , was the daughter of Col. and Mrs James R. Branch .