The “elephant slayer” is a C96 Broomhandle Mauser. Made from 1896 through 1937, it’s feasible that this pistol would have been the leading edge in Penny Dreadful’s late-19th century setting. The energy delivered by this tiny caliber pistol, while impressive for the time, was only about 400 foot-pounds, which is about the same as the average 9mm modern pistol. So I call foul on the elephant slayer credentials. I checked out an actual “elephant gun at this year’s NRA Annual Meeting. That one was a .600 Purdy Nitro Express. Yes, it was absolutely gorgeous and cost more than most four-bedroom homes. It was a .60 caliber double rifle that delivers a whopping 8,700 foot-pounds of energy. Now that’s an elephant gun!