and identified as the third planet of the star Malak in the spiral nebula Messier 101. The site of Mrs Whatsit's temporary transformation into one of these winged creatures, it is the place where "the guardian angels" [i.e. the Mrs Ws, who are explicitly referred to as such by Calvin later in the book] "show the questers a vision of the universe that is obscured on earth." They also stop briefly on an unnamed two-dimensional planet and on an unnamed planet in Orion's belt, the latter of which is the home of the Happy Medium. Other places Two places visited by Meg and Calvin in A Wind in the Door do not fit neatly into either of the above two categories. Yadah - the home of the farandolae Senex and Sporos, located in a mitochondrion inside one of Charles Wallace's cells. The site of the decisive battle against the Echthroi in A Wind in the Door, it serves to demonstrate L'Engle's premise that variations in size "are in reality, quite unimportant," as Blajeny states in the book; and that macrocosm and microcosm are both part of the interdependence of everything in the Cosmos. "If a butterfly winging over the fields around Crosswicks should be hurt, the effect would be felt in galaxies thousands of light years away," L'Engle says in A Stone for a Pillow. "The interrelationship of all of Creation is sensitive in a way we are just beginning to understand." The name comes from a Hebrew verb meaning "to extend the hand", and by extension, "to worship with extended hand". Metron Ariston - not an objectively real place, but "an idea, a postulatum" visited by Meg and Calvin in A Wind in the Door. As posited by Blajeny and seen by Meg, it has Meg's star-watching rock, but the stars above correspond to "the Mondrion solar system in the Veganuel galaxy", Blajeny's home galaxy. The use of this theoretical rather than actual location allows beings of disparate sizes — humans, Blajeny (a giant by human standards), a "singular cherubim" and a farandola — to interact without regard to problems of scale. Polly O'Keefe series As newlyweds, Calvin O'Keefe and his wife Meg live in an apartment near the unnamed hospital where Calvin works. By the time of The Arm of the Starfish, about twelve to thirteen years later, the family has settled on the first of two fictional