LOUIS PASTEUR (1822-1895) Autograph letter signed ‘L. Pasteur’ Paris, May 15, 1893, addressed to M. de Rienzi at Le Vésinet (Seine-et-Oise)

Half-page in-8, with the letterhead of the Pasteur Institute. In French 17.7 x 11.5 cm Handwritten envelope on letterhead, with stamp and postmarks. Ink on paper, trace of folding inherent in the shipment. Response to a request for an autobiographical note ‘… the state of my health does not allow me to do the work you ask of me. I feel very sorry about this...’.