"The Journal of the Debates in the Convention which Framed the Constitution of the United States, May-September, 1787", Volume 2, as recorded by James Madison, 1908.
George Mason's remarks at the debates in the Federal Convention (August 22, 1787) as quoted in "The Journal of the Debates in the Convention Which Framed the Constitution of the United States, May-September, 1787, Volume 2" edited by James Madison and Gaillard Hunt, 1908.