The Probert Encyclopaedia of Greek & Roman Mythology

ARGUS

In Greek mythology the Argus was a beast and son of Arestor with a hundred eyes of which he could only close two at a time. He was placed by Juno to guard Io, whom Jupiter had changed into a heifer. But Mercury, who was sent to carry her off, managed to surprise and kill Argus whereupon Juno transferred his eyes to the tail of a peacock, her favourite bird. In Greek mythology, Argus was the name of the builder of the Argo, the ship that carried the hero Jason in his quest for the Golden Fleece
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