 The character of Betty, the proprietress of the nearby health food store is reused in "Humpty Dumpty in Oakland".The character of Stuart Hadley returns in "Dr. Bloodmoney" as a black man by the name of Stuart McConchie, as opposed to the Caucasian character from "Voices from the Street", and again in Dick's science fiction novel "The Crack in Space".In this novel Hadley is once again Caucasian and works for a character named Darius Pethel, who is essentially the same as Fergesson.