The Wrong Box is one of Robert Louis Stevenson's strangest works. Written with his stepson Lloyd Osborne, it is a masterpiece of black comedy, turning on mistaken identity, the disappearance of a corpse, and several makeshift coffins. V. S. Pritchett described it as "a farce that slips down the throat with the nicety of an oyster," and, according to E. F. Benson, it is "perhaps the most superb extravaganza in the language." In this intriguing work, the Finsbury family has long been involved in a Tontine - a scheme in which subscribers invest money in a fund which them falls to the last...