On approaching the haunt of the dread monsters, Ulysses kept strict watch to discover them.  The roar of the waters as Charybdis ingulfed them, gave warning at a distance, but Scylla could nowhere be discerned.  While Ulysses and his men watched with anxious eyes the dreadful whirlpool, they were not equally on their guard from the attack of Scylla, and the monster, darting forth her snaky heads, caught six of his men, and bore them away, shrieking, to her den.  It was the saddest sight Ulysses had yet seen; to behold his friends thus sacrificed and hear their cries, unable to afford them any assistance.

Circe had warned him of another danger.  After passing Scylla and Charybdis the next land he would make was Thrinakia, an island whereon were pastured the cattle of Hyperion, the Sun, tended by his daughters Lampetia and Phaethusa.  These flocks must not be violated, whatever the wants of the voyagers might be.  If this injunction were transgressed destruction was sure to fall on the offenders.

Ulysses would willingly have passed the island of the Sun without stopping, but his companions so urgently pleaded for the rest and refreshment that would be derived from anchoring and passing the night on shore, that Ulysses yielded.  He bound them, however, with an oath that they would not touch one of the animals of the sacred flocks and herds, but content themselves with what provision they yet had left of the supply which Circe had put on board.  So long as this supply lasted the people kept their oath, but contrary winds detained them at the island for a month, and after consuming all their stock of provisions, they were forced to rely upon the birds and fishes they could catch.  Famine pressed them, and at length one day, in the absence of Ulysses, they slew some of the cattle, vainly attempting to make amends for the deed by offering from them a portion to the offended powers.  Ulysses, on his return to the shore, was horror-struck at perceiving what they had done, and the more so on account of the portentous signs which followed.  The skins crept on the ground, and the joints of meat lowed on the spits while roasting.

The wind becoming fair they sailed from the island.  They had not gone far when the weather changed, and a storm of thunder and lightning ensued.  A stroke of lightning shattered their mast, which in its fall killed the pilot.  At last the vessel itself came to pieces.  The keel and mast floating side by side, Ulysses formed of them a raft, to which he clung, and, the wind changing, the waves bore him to Calypso’s island.  All the rest of the crew perished.

The following allusion to the topics we have just been considering is from Milton’s “Comus,” line 252: 

“...  I have often heard My mother Circe and the Sirens three, Amidst the flowery-kirtled Naiades, Culling their potent herbs and baneful drugs, Who as they sung would take the prisoned soul And lap it in Elysium.  Scylla wept, And chid her barking waves into attention, And fell Charybdis murmured soft applause.”

Scylla and Charybdis have become proverbial, to denote opposite dangers which beset one’s course.  See Proverbial Expressions.