French Roman Catholic priest, constitutional bishop of Blois, and revolutionary leader (1750-1831) who was an ardent abolitionist, a supporter of universal suffrage, and a founding member of the Bureau des longitudes, the Institut de France, and the Conservatoire national des arts et métiers. ALS in French, signed “Gregoire,” one page, 6.75 x 8.5, April 14, 1815. Untranslated handwritten letter to "Monsieur Thiry." In very good to fine condition, with overall foxing.
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