A man uses Pavlovian conditioning on his actress beloved in order to get her to automatically shoot his rival when he rings a bell. Things go well for him until a fire breaks out in his domicile, and when his wife hears the bells she shoots at the firemen, so they leave him to burn to death.; Bwana Brown, a member of the Explorer's Club, speaks at a meeting of an African tribe who will give gold and diamonds to anyone who can prove they are immortal. The explorers ask for the location of this tribe, figuring to impress the natives with modern gadgets and pass the test, but Bwana Brown refuses to tell them. One of the hunters attempts to kill him with a spear, and afterward steals the map. He finds the tribe and agrees to their test, but they cut off his head. Bwana Brown says to his friends "Pity he didn't ascertain that I actually was immortal before he tried to kill me."; A few years after 2439 a time capsule is unearthed that was buried in 1939 on some islands that previously had demonstrated no record of human habitation.; This is sort of a "Ransom of Red Chief"-type story where, after the rotten kid dies and is taken by Death, he goes to work on Death himself and kills him so he's remembered by immortal humans as a hero.