a percussion carriage pistol by h.w.mortimer, gunmaker to his majesty, london, circa 1790 converted from flintlock, with rebrowned swamped signed octagonal sighted barrel (pitted), finely engraved breech tang incorporating the back-sight, signed stepped bolted lock (rubbed), set trigger, figured walnut full stock, chequered butt carved with a characteristic spiral pattern at the base, engraved reblued spurred steel trigger-guard with delicate pineapple finial, and a pair of reblued steel ramrod-pipes (ramrod missing) 40cm; 15 3/4in