"She drew the true paths in glowing red, false ones in green — and there was a lot more green than red. The critter who designed that tower had a twisty mind. What appeared to be the main entrance went in, up, branched and converged, passed close to the Chamber of the Egg — then went back down by a devious route and dumped you out, like P. T. Barnum's "This Way to the Egress.""