This very attractive knife pistol was designed by Joseph-Celestin Dumonthier who patented "couteaux de chasse pistolets" (knives with hunting pistols) in 1840. His surname usually appears spelled both as Dumonthier in period sources and modern texts, but many of these knife pistols have "Domouthier." He was patenting inventions as early as at least 1839. Hunting swords and knives with built in pistols had been in use for a few centuries in Europe by that time. They were primarily used to dispatch downed animals such as wounded boars during hunts. Emperor Maximilian I of Mexico owned one of these attractive knife pistols (currently part of the collections of the Art Institute of Chicago), and a gilded example like this would certainly have been suitable as a presentation piece or gift to a wealthy man. It has scrollwork patterns etched along the 8 1/8 inch dagger blade, both barrels, the spines, and even the back of the trigger. All of these surfaces are also finished with gold plating. The blade is marked "DUMOUTHIER" above the left barrel and has "BREVET DVN" below the barrel. The scales are spiral cut. The upper section of the quillions pull back revealing the nipples and serve as the hammers. When the right hammer is pulled back, the folding trigger extends. Pulling the trigger first engages the right hammer, and then, once the trigger is reset, it can be pulled a second time to engage the left hammer.