From "Pennsylvania Kentucky Rifle" by Henry J. Kauffman, page 93: "A pair of such pistols, made by Fredrick Zorger of York, Pennsylvania, is exhibited in the Winterthur Museum, at Winterthur, Delaware. They are stocked in walnut, have silver mountings, and a very delicate pierced pattern in the lockbolt plate. The round barrels taper in the traditional manner and have "Yorktown" engraved on the top near the breech. The plain handmade locks are quite incongruous to the balance of the workmanship,