chunk: In one building, they come across a ratlike being hunched over a Martian book. Tweel angrily chases the rat-thing away and replaces the book on a shelf, though the Earthmen are not sure whether the rat-thing was reading the book or eating it. Elsewhere in the building, which seems to be a library, Tweel shows the Earthmen a huge mural of a human kneeling before a seated Martian. When Leroy remarks that the Martian in the mural looks like the Egyptian god Thoth, Tweel excitedly repeats the name, pointing to itself and all around them at the city. The Earthmen realize that Tweel's people, the Thoth, had visited ancient Egypt and served as inspiration for the Ibis-headed god. (This is actually anachronistic, since Thoth was the classical Greek version of the god's name.)