AN IRISH OVER-AND-UNDER SINGLE-TRIGGER BACK-ACTION PERCUSSION PISTOL with rebrowned twist barrels, signed scroll engraved back-action locks (hammers replaced), engraved tang extending to form a hinged back-strap revealing cavaties for caps and balls, figured walnut butt, chequered grip, engraved trigger-guard and pommel, and stirrup ramrod (some wear and pitting, ramrod-pipe replaced), by John Lanigan, Dublin, circa 1830-40