. . . . . "American politician" . "William O. Callis (March 4, 1756 \u2013 March 14, 1814) was the son of William Harry Callis and Mary Jane Cosby. He was a childhood friend of Presidents James Madison and James Monroe, was with Washington at Yorktown, and was known to Lafayette, Thomas Jefferson, and Benedict Arnold."@en . "1756-03-04Z"^^ . . "1814Z"^^ . "1814-03-14Z"^^ . "1756Z"^^ . "William Overton Callis"@en . . . "Callis, William Overton"@en . . . . . .