Two bound documents, "A chronological series of facts relative to Louisiana" and "An examination into the boundaries of Louisiana." Prepared by Jefferson for U.S. ministers at Paris and Madrid, as a means of determining the extent of the Louisiana Purchase. Jefferson sent these to the APS with a cover letter to Peter S. Du Ponceau, dated December 30, 1817; read in the Historical and Literary Committee, 1818. Printed in Thomas Jefferson, Documents Relating to the Purchase and Exploration of Louisiana (New York, 1904).

This collection consists almost entirely of letters, mostly written by Jefferson, to various people. The largest portion of the letters are from Jefferson to Louis Hue Girardin concerning the latter's work in completing The history of Virginia: from its first settlement to the present day, Volume 4 . Of particular interest is Jefferson's notes on his colleges' role in that history, including the plot to establish a dictator of Virginia. The letters to Girardin also include discussions of plants, the building of the University of Virginia, and books.