Clio, the Proclaimer
Clio was one of the nine muses, the daughters of Zeus and Mnemosyne. Living with her sisters on Mount Helicon, the muses mediated the arts to humanity, under the protection of Apollo.
Clio is the muse of history. She is usually depicted with her attribute, a scroll, and sometimes with a chest of books and/or a crown of laurels.
Of all the muses, Clio is one of the most rarely depicted, though she figures prominently in an allegorical painting by Vermeer, from the 17th century.
According to Apollodorus (Library and Epitome, 1.3.3), Clio twitted Aphrodite with her love of Adonis, and in consequence of the goddess' wrath, Clio fell in love with Pierus, by whom she bore Hyacinth.
Majestic Clio touched her silver wire,
And through time's lengthened vista moved a train,
In dignity sublime;--the patriot's fire
Kindled its torch in heaven's resplendent ray,
And 'mid contention rose to Heaven again.
-from "An Ode To Music" by James G. Percival