Professor (1787–1854) at the University of Pennsylvania, director of the US Mint, and cryptology enthusiast who frequently exchanged coded messages with Thomas Jefferson. Partly-printed DS issued to Patterson, signed by Joseph Tagert and John Knox, one page, 18 x 24, December 14, 1836. Beautifully engraved document issued “to Certify that Doctr R. M. Patterson has been admitted a Member of the Hibernian Society, for the Relief of Emigrants from Ireland, established in the City of Philadelphia.” In very good to fine condition, with intersecting folds with some separations repaired with tape to reverse, a few edge tears, and some ink transfer from the engraved vignette. Pre-certified PSA/DNA.
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