Sextus Empiricus Pyrrhoniae Hypotyposes 3.6.30

[30] So far, then, as concerns the efficient Principle this account will suffice for the present. But we must also give a brief account of what are called the Material Principles. ¹ Now that these are inapprehensible may easily be gathered from the disagreement which exists about them amongst the Dogmatists. For Pherecydes of Syros ² declared earth to be the Principle of all things; Thales of Miletus, water; Anaximander (his pupil), the Unlimited; Anaximenes and Diogenes of Apollonia, air; Hippasus of Metapontum, fire; Xenophanes of Colophon, earth and water; Oenopides of Chios, fire and air; Hippo of Rhegium, fire and water; Onomacritus, in his Orphica, fire and water and earth;