John Grimes Walker
John Grimes Walker (20 March 1835 – 16 September 1907) was an admiral in the United States Navy who served during the Civil War. After the war, he served as Chief of the Bureau of Navigation and head of the Lighthouse Board. In retirement, he led commissions to investigate the construction of a Central American canal connecting the Atlantic and Pacific Oceans.
Benson John Lossing, ed. Harper's Encyclopedia of United States History (vol. 10) (New York, NY: Harper and Brothers, 1912)