
Letter to Abigail Adams (22 May 1777), as quoted in And the War Came: The Slavery Quarrel and the American Civil War https://books.google.com/books?id=WbFznb7PSGsC&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false, by Donald J. Meyers
1770s