Two ancient authorities, and two only, appear at first sight definitely to place the Enneakrounos on the Ilissus. These must be examined in detail. First, the _Etymologicum Magnum_[334], under the heading _Enneakrounos_, says, ‘a fountain at Athens by the Ilissus, which was formerly Kallirrhoë, to which they go to fetch the water for baths for brides.’ Unquestionably, whoever wrote this thought the Enneakrounos was on the Ilissus. But then by the time the _Etymologicum Magnum_ was compiled the old Kallirrhoë at the Pnyx was long forgotten. The statement looks as if it had come originally from Thucydides[335], and as if the topographical ‘by the Ilissus’ had been added by some ambitious but ignorant compiler. Against this statement of the _Etymologicum Magnum_, for what it is worth, we may set the statement of another lexicographer[336]. Explaining the expression ‘Wedding Baths,’ he says, ‘the baths brought from a fountain from the agora.’ The wildest topographer has never placed the agora by the Ilissus, though it might go there with quite as good reason as the ancient city well. * * * * * A second ancient literary authority seems at first sight indisputably to place the Enneakrounos near to the temple of Zeus Olympios and, if there, then, as a necessary consequence, on the Ilissus. In the preface to a treatise by Hierocles[337] on _Veterinary Medicine_ there occurs, apropos of the age to which horses and mules live, the following statement: ‘Tarantinos narrates that the Athenians _when they were building the temple of Zeus near Enneakrounos_ passed a decree that all the beasts of burden should be driven in from Attica to the town.’ This seems perfectly definite and circumstantial, and the passage has been eagerly seized on by all those who wished to prove that the Enneakrounos was on the Ilissus. Quite naturally, but wait a moment. It is essential that the passage be read to the end. Tarantinos goes on, ‘and a certain husbandman through fear of this decree drove in an aged mule in its eightieth year. But the people out of respect for its age enacted that the mule was to be leader of all the beasts of burden employed in the building of the temple, it was to walk in front unyoked and unspurred, and that none of the wheat-merchants or barley-merchants were to drive it away from their houses or prevent it from browsing.’