The myth of Io must have been well known to Homer, who often calls Hermes "Argeiphontes", which is often translated as "Argus-slayer", though this interpretation is disputed by Robert Beekes. Walter Burkert notes that the story of Io was told in the ancient epic tradition at least four times of which we have traces: in the "Danais", in the "Phoronis"—Phoroneus founded the cult of Hera, according to Hyginus' "Fabulae" 274 and 143—in a fragment of the Hesiodic "Aigimios", as well as in similarly fragmentary Hesiodic "Catalogue of Women". A mourning commemoration of Io was observed at the Heraion of Argos into classical times.