He recorded a few important facts about the Negroes immediately before the Civil War.
Woolman, John.

_Journal of John Woolman, with an Introduction by John G.
Whittier_.

(Boston, 1873.) Woolman traveled so extensively in the colonies that he probably knew more about the Negroes than any other Quaker of his time.
LETTERS Boyce, Stanbury.

_Letters on the Emigration of the Negroes to Trinidad_.
Jefferson, Thomas.

_Letters of Thomas Jefferson to Abbe Gregoire, M.A.
Julien, and Benjamin Banneker.