English-born forger (1813-1876) who forged letters from luminaries like George Washington, Benjamin Franklin and Horatio Nelson. Robert Spring forgery of an ALS signed “G:o Washington, Comm'g,” one page, 6.75 x 4.25, March 16, 1778. A letter to "Capt'n Fisher," in full: "Extend your picket across the bridge with a patriot on the Norristown Road as far as the King of Prussia Tavern,—With orders to bring in all strangers unable to give a good account of themselves,—also every auspicious person loitering within three miles of the lines such arrest to be immediately reported to Gen'l Varnum." In fine condition, with repairs to fold separations on the reverse.