The Grey Sisters

Before sending him off on this tangled path, Athena lent Perseus her mirrored shield and suggested how he make use of it. And while her directions were somewhat deficient as to particulars, Perseus did indeed track down Atlas, who grudgingly gestured in the direction of a nearby cave where, sure enough, he found the Graeae. Perseus had heard the version of the myth whereby these Sisters, though gray-haired from infancy and sadly lacking in the eyeball department, were as lovely as young swans. But he was disappointed to find himself taking part in the version that had them as ugly as ogres.