Eudicus informs us that in Hestiæotis[1] there are two springs; one of which, Cerona, renders sheep black that drink of it, while the other, called Neleus, turns them white: if, again, a sheep should happen to drink their waters mixed, its fleece will be mottled. According to Theophrastus, the water of the Crathis,[2] a river of Thurii, makes sheep and cattle white, while that of the river Sybaris turns them black.