German naturalist and explorer (1769-1859) who wrote Kosmos, a massive five-volume study which attempted to unify the various branches of man's knowledge. ALS in French, signed "Humboldt," one page, 4.75 x 7.25, June 1, 1812. Untranslated handwritten letter to "Monsieur Scholl" in Paris. In very good to fine condition, with overall wrinkling, light staining to the upper blank portion, a rusty circular paperclip impression to the top, and partial loss to the integral leaf.
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