Lt. Col. Peter Hawker "Instructions to Young Sportsmen in all that Relates to Guns and Shooting" (9th edition, 1844); Charles B. Norton "American Breech-Loading Small Arms: A Description of Late Inventions including The Gatling Gun, and a Chapter on Cartridges" (1872); Charles B. Norton "American Inventions and Improvements in Breech-Loading Small Arms, Heavy Ordnance, Machine Guns, Magazine Arms, Fixed Ammunition, Pistols, Projectiles, Explosives, and Other Munitions of War, Including a Chapter on Sporting Arms" (1880). Provenance: The Norman R. Blank Collection