FC (PPAmP); in Vaughan’s hand; at head of text: “Thomas Jefferson President of the US.” Enclosure: Alexander von Humboldt to Vaughan, 10 June, from Rome; although Humboldt previously promised that within a month he would be able to offer the first two volumes of his work, the engraver has been so slow that he has managed to finish only the first section of equinoctial plants; Humboldt awaits the completion of his table on the equatorial regions (“mon tableau physique des regions équatoriales”), which he will address to Vaughan, the president, and Benjamin Smith Barton; Humboldt praises the United States, which presents such a beautiful moral picture (“beau tableau morale”), and hopes that with TJ’s help he will one day force his way into the immense regions of the west; while in Paris, he read nine papers to the national institute; Vaughan will have seen the papers on magnetism and on an analysis of air; Humboldt has since done a comparison between the Andes and Mont Cenis in the “Ex-republique” of Genoa; by September he will be in Berlin, where the king has named him to the Prussian academy; he will stay there as long as it is useful for his publications and then will pursue his projects in the Missouri, the Arctic Circle, and Asia; one must take advantage of youth and then die a citizen of Fredonia; while in Berlin, he hopes to be a useful correspondent of the American Philosophical Society; Carlos Montufar is in Madrid and has received promises from Manuel de Godoy (“le Prince de la Paix”), while Aimé Bonpland has received a pension of 3,000 francs from the emperor; the domestic servant has returned to Cumaná with the dog; Humboldt asks Vaughan to salute for him the many individuals he met in the United States and to pay a thousand respects to the president and to Gallatin and Madison; an English translation of Humboldt’s works will be published, and Humboldt asks that Vaughan print a prospectus in the United States (RC in same; in French; printed in Ingo Schwarz, ed., Alexander von Humboldt und die Vereinigten Staaten von Amerika: Briefwechsel [Berlin, 2004], 105-8).