LOUISIANA. -- VERGENNES, Charles Gravier, Comte de. Mémoire Historique et Politique sur la Louisiane. Paris: Lepetit, 1802. 8°. Engraved frontispiece portrait. Contemporary quarter calf (rebacked preserving original spine). FIRST EDITION. – BISHOP, Abraham. Oration, in honor of the election of President Jefferson, and the peaceable acquisition of Louisiana, delivered at the national festival, in Hartford, on the 11th of May, 1804. [New Haven]: for the General Committee of Republicans, 1804. 8°. Modern quarter leather. FIRST EDITION. Bishop, an ardent supporter of Jefferson, delivered a number of influential addresses, which were widely quoted and circulated. – Code Civil de l’État de la Louisiane. Traité de cession de cet état; Constitution des États-Unis d’Amérique. [Paris]: E. Duverger, 1825. 8°. Half-title. Contemporary mottled sheep (rebacked). FIRST EDITION IN FRENCH, preceded by two editions in English and French, both published in 1825, in New Orleans and Paris. The first comprehensive civil code for Louisiana. – BARBE-MARBOIS, Francois, Marquis de. Histoire de la Louisiane. Paris: Firmin Didot, 1829. 8°. Half-title. Contemporary green quarter calf, marbled boards. FIRST EDITION, authored by a key negotiator of the Louisiana Purchase and friend of Jefferson and Washington. – DE LAUSSAT, Pierre Clément. Mémoires sur ma vie, a mon fils, pendant les années 1803 et suivantes…a la Louisiane. Pau: É. Vignancour, 1831. 8°. Half-title. Contemporary boards. FIRST EDITION of this rare account of the Louisiana Purchase, written by de Laussat, the French Commissioner. – BIBB, George M. Report of the Secretary of the Treasury communicating…Information in relation to the claim to land in the State of Louisiana, called the “Houmas claim.” [Washington, D.C.]: n.p., 13 January 1845. 8°. Engraved folding plan. Modern cloth. FIRST EDITION. – Together, 6 works in 6 volumes, condition varies, but generally good.