1Peter S. Du Ponceau to Thomas Jefferson, 9 October 1820 (Jefferson Papers)
I take the liberty of introducing to you in the person of M r L. C. Vanuxem , the bearer hereof, a young American, who to a mind formed by nature for the Philosophical Sciences, unites the advantages of a regular Scientific education in the best Schools & under the best professors abroad. He is lately returned from Paris where he was three Years engaged exclusively in the Study of Chemistry &...
2Peter S. Du Ponceau to Thomas Jefferson, 23 March 1821 (Jefferson Papers)
I had the honor some time ago of introducing to you M r L. C. Vanuxem , a young American Mineralogist, whom you had the goodness to receive at your House with D r Cooper . Being a Candidate for the professorship of Chemistry & Mineralogy in the new University at Charlotte ville , his father