There were nine Muses according to Hesiod, protecting a different art and being symbolised with a different item; Calliope (epic poetry – writing tablet), Clio (history – scroll), Euterpe (lyric poetry – aulos, a Greek flute), Thalia (comedy and pastoral poetry – comic mask), Melpomene (tragedy – tragic mask), Terpsichore (dance – lyre), Erato (love poetry – cithara, a Greek type of lyre), Polyhymnia (sacred poetry – veil), and Urania (astronomy – globe and compass). On the other hand, Varro mentions that only three Muses exist: Melete (practice), Mneme (memory) and Aoide (song). [From GreekMythology.com]