Henry Deringer, The Father of Concealed Carry (interview with Russ Dodge)

All Bones Considered: Laurel Hill Stories #003 - Easterners of the Old West, Part 1

Henry Deringer was a Philadelphia gunsmith whose single-shot bore-loading pistol could be concealed in a pocket, a hand muff, or the palm of your hand.  Its popularity exploded after John Wilkes Booth used one to assassinate President Lincoln.