We read, too, of hanging gardens,[1] and what is even more than this, a hanging city,[2] Thebes in Egypt: it being the practice for the kings to lead forth their armies from beneath, while the inhabitants were totally unconscious of it. This, too, is even less surprising than the fact that a river flows through the middle of the city. If, however, all this had really been the case, there is no doubt that Homer would have mentioned it, he who has celebrated the hundred gates of Thebes.