Letter not found. 16 June 1803. Calendared as a one-page letter in the lists probably made by Peter Force (DLC, series 7, container 2) and offered for sale in Stan. V. Henkels Catalogue No. 694 (1892), item 123.
“To James Madison from John Walker, 16 June 1803,” Founders Online, National Archives, last modified October 5, 2016, http://founders.archives.gov/documents/Madison/02-05-02-0119. [Original source: The Papers of James Madison, Secretary of State Series, vol. 5, 16 May–31 October 1803, ed. David B. Mattern, J. C. A. Stagg, Ellen J. Barber, Anne Mandeville Colony, and Bradley J. Daigle. Charlottesville: University Press of Virginia, 2000, p. 101.]