Autograph Letter Signed to "le Comte Cossilla, conservateur des Archives Royales, a [Turin?]".

In French. One page, 4to, blank bifoliate, fold marks, mainly good condition. The central subject is autograph-collecting. He initially refers to the "interessants" autographs which Cossilla sent him in 1841and which had not arrived by a diplomatic conduit but only 4 or 5 months previously. He makes a comment about his "relations autographiques" with his correspondent and promises to offer duplicates ("doubles [underlined] qui pourront vous convenir"). Note: an online reference to de Stassart (a Descartes letter from his collection) indicates a major autograph collector.