He was elected a Fellow of the American Academy of Arts and Sciences in 19XX .
Walker also served as a Fellow of Harvard College ( 1834 - 1853 ) and a member of its Board of Overseers ( 1825 - 1836 , 1864 - 1874 ) .
Walker was elected a Fellow of the American Academy of Arts and Sciences in 19XX .
Walker also served as a Fellow of Harvard College ( 1834 - 1853 ) and a member of its Board of Overseers ( 1825 - 1836 , 1864 - 1874 ) .