John Quincy Adams Quotes about Slavery
Slavery is the great and foul stain upon the North American Union.
John Quincy Adams (1969). “The diary of John Quincy Adams, 1794-1845: American diplomacy, and political, social, and intellectual life, from Washington to Polk”
"John Quincy Adams and the Politics of Slavery: Selections from the Diary". Book by David Waldstreicher and Matthew Mason, 2016.
"Wise Words and Quotes". Book by Vernon K. McLellan (p.281), 2000.