sentences:  At one point in "The Moon by Night", Suzy Austin makes a joke about "tessering", and Vicky's first person narrative identifies this comment as relating to the story of Meg and Charles Wallace Murry.This reference to the events of "A Wrinkle in Time", which was published the previous year, may be seen as "breaking the fourth wall", but alternatively may mean that the Austins are aware of the Murrys' experiences as actual past events.Since Vicky and Meg's daughter, Polly O'Keefe, both date Zachary Gray, Vicky and Suzy are referring to events a generation earlier.