Ferguson developed his rifle from two earlier types of breechloaders, the Hardley and the Foster, upon which it was an actual improvement, and his gun has the distinction of being the first breechloading arm used by organized troops of any nation. The piece is equipped with a breechplug which passes perpendicularly through the breech of the barrel and this, having a quick-traveling screw thread, is lowered or raised by a single revolution of the trigger guard acting as a lever. When the breech plug is lowered, a circular opening is left in the top of the barrel just large enough to take a spherical bullet. In loading, the muzzle is held downward and the ball, fitting snugly, is dropped into the opening and permitted to roll forward to the front of the breech chamber where it is stopped by the lands of the rifling. No wadding or patch is used. Powder and ball rolled to form a cartridge would prove only a hindrance and disadvantage in loading. A charge of powder is poured directly from a flask or horn into the opening behind the bullet, filling the chamber. One complete turn of the trigger guard causes the breech plug to rise, closing the opening and ejecting the superfluous grains of powder. When the flashpan is primed, the piece is ready for firing. In the third illustration of this booklet the breech mechanism and method of loading are shown. Major Ferguson is accredited with loading and firing six shots in one minute. No recent check is known to have been made upon the number of Ferguson rifles now in existence. They undoubtedly do exist, but their number is probably small. Apparently only some 200 were made originally and their military use ended, owing to lack of foresight, with the American Revolution. Six specimens were listed in 1928 as being in collections in this country and in England, of which one, probably two, were made by Newton, of Grantham, two by Egg, of London, and one each by Turner and Wilson, of London. These six guns varied somewhat in minor details. A seventh specimen, the one now possessed by the Service at Kings Mountain National Military Park, South Carolina, bears the name of F. Innis, Edinburgh. It is in exceptionally fine condition, showing much of the original metal finish, and is without replacements. The piece measures 4 feet 4¾ inches over all and weighs 7½ pounds. The barrel, slightly belled at the muzzle and not designed to carry a bayonet, is 37 inches long, rifled with 8 grooves, and takes a ball of .655 caliber. The full length combed walnut stock is checkered at the grip and has three brass thimbles and an engraved butt plate. On the lock plate forward the hammer, within a scroll, is the name, F. INNIS, and this, with the addition of EDINBURGH, together with the proof mark and the view mark of the Gunmakers’ Company of London, appears upon the barrel. The wooden ramrod is horn-tipped and at the other end has a bullet worm enclosed within a screw cap. The arm was intended for an officer.