The Complete Bostock and Harris : The Strange Affair of Adelaide Harris / The Night of the Comet

Two stories published separately in the 1970s, in the first of which Harris offers Bostock the affections of his sister in exchange for the brass telescope of Bostock's father and starts a string of misunderstandings about who is courting whom, and in the second, the boys experiment to see if a wolf will adopt Harris's infant sister, Adelaide