“A rainbow mouse?” Raven asks, as a second appears from a
different opening.
“Indeed,” the guide replies. “Once upon a time, if somebody
had an amusing idea like a cartoon mouse all the colours of the
rainbow, that idea might pop up here, run around for a few days,
then disappear. If that person wrote their idea down or drew a
picture, it might last a bit longer, but it'd eventually be so thin
as to be nothing at all.”
More mice appear, all multicoloured. Raven counts six, no eight,
twelve. It's not long before he's lost track and the courtyard is
teeming with hundreds of rainbow mice, all running in different
directions, bumping into each other with a pop.
