Thomas Elsworth Mortimer, a member of the famous British gunmaking dynasty, established himself in London and Edinburgh until 1835 when he moved his business in its entirety to Edinburgh. With the rib signature alluding to no longer having premises on St. James Street in London we can date this shotgun to circa 1835-40 and the beginning of his business solely based in Scotland. With browned damascus barrels with sunken concave rib bearing a bead front sight and signed “T.E. MORTIMER EDINBURGH LATE ST. JAMES ST. LONDON” and numbered “1” of a pair. The underside of the barrels each struck with London proof marks and maker’s marks “TEM” and “JT”. Serial numbered patent breeches each with platinum plug and engraved with a panel of foliage on the rib section. Scroll engraved standing breech and border and scroll engraved bar-in-wood locks each signed “T.E. MORTIMER” and engraved with a differing game scene involving dogs and game birds. Light colored well figured straight hand walnut half stock with checkered grip and forearm. Iron mounts engraved en suite with the locks and standing breech including trigger guard engraved with a further game scene on the bow. With brass mounted ramrod with worm. In two tone pigskin lined fitted oak case with John Dickson & Son printed trade label which has an owner’s label bearing a crest and motto pasted in the middle, with accessories including brass powder flask with foliate design, leather shot flask, various turnscrews and tools, and a large brass percussion cap dispenser. A note in the case details that this gun along with serial no. 5974 were made as a pair for a Major Ferguson in “1850 ish”.