The works Dufief sent TJ this morning (ce matin) were (1) John Melish’s map, described as “an elegant colored sheet map for only a dollar” (Richmond Enquirer, 23 Oct. 1812) and meant to be paired with his publication, A description of the British Possessions in North America and of the most important places along the lines in the United States: intended as an accompaniment to Melish’s Map of the seat of war in North America (Philadelphia, 1812), and (2) Thomas Simpson, The Doctrine and Application of Fluxions (London, 1805; Sowerby, description begins E. Millicent Sowerby, comp., Catalogue of the Library of Thomas Jefferson, 1952–59, 5 vols. description ends no. 3677). With that parcel or this letter he also forwarded a receipt for $6.18 for his purchase of Simpson’s book from Philadelphia book publishers Kimber & Conrad (MS in DLC; dated 4 Nov. 1812; written in the hand of John Humphrey Jr. on a small slip of paper).