XJF147315 Poetry and Music, the Nine Muses inspiring Arion, Orpheusan Pythagoras, under the auspices of the Personified Air, source of all Harmony, from the \'Liber Pontificalis\' (Book of the Popes) illustration from \'Science and Literature in the Middle Ages and the Renaissance\', written and engraved by Paul Lacroix, 1878 (engraving) (b/w photo) by Italian School, (13th century); Private Collection; Italian, out of copyright.