Pausanias, The Description of Greece — Book VIII (1918)
“ The festival of Stymphalian Artemis at Stymphalus was carelessly celebrated, and its established ritual in great part transgressed. Now a log fell into the mouth of the chasm into which the river descends, and so prevented the water from draining away, and (so it is said) the plain became a lake for a distance of four hundred stades. 8.22.9 They also say that a hunter chased a deer, which fled and plunged into the marsh, followed by the hunter, who, in the excitement of the hunt, swam after the deer. So the chasm swallowed up both the deer and her pursuer. ”
