James Madison to the President of the Literary Fund, 24 November 1826 [Retirement Series 4:184]+
James Madison to Jonathan Elliot, 25 November 1826 [Retirement Series 4:185 n.]+
James Madison to Thomas Cooper, 26 December 1826 [Retirement Series 4:259 n.]
Jared Sparks to James Madison, 12 April 1827 [Retirement Series 4:394]