The Muses Urania and Calliope by Simon Vouet
 First then let us name Orpheus whom once Calliope bare, it is said, wedded to Thracian Oeagrus, near the Pimpleian height. Men say that he by the music of his songs charmed the stubborn rocks upon the mountains and the course of rivers. And the wild oak-trees to this day, tokens of that magic strain, that grow at Zone on the Thracian shore, stand in ordered ranks close together, the same which under the charm of his lyre he led down from Pieria. Such then was Orpheus whom Aeson's son welcomed to share his toils, in obedience to the behest of Cheiron, Orpheus ruler of Bistonian Pieria.