George Fosbery was the British officer (Major, at the time of this particular design) responsible for the quite famous Webley-Fosbery self-cocking revolver, as well as the Paradox system for shotgun slugs and many other lesser known firearms inventions. This rifle was his entry into British trials in the late 1860s for a cartridge firing rifle. Ultimately the Martini-Henry would be chosen, but a nine different guns were put through testing including Fosbery’s.
One of the aspects that Fosbery’s design was particularly well suited for was the requirement that the gun be able to be loaded with a minimum amount of movement required that might interfere with men standing in close formation. Despite this, Fosbery only managed to come in 6th place in the trials, and only a small number of his guns were sold on the civilian market afterwards.