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.” Intersecting folds with some separations repaired with tape to reverse, a few edge tears, and some ink transfer from the engraved vignette, otherwise fine condition. RR Auction COA.
