To the other gods he offers sacrifices according to the Alban rite; to Hercules, according to the Grecian rite, as they had been instituted by Evander.

There is a tradition, that Hercules, having killed Geryon, drove his oxen, which were extremely beautiful, into those places; and that, after swimming over the Tiber, and driving the cattle before him, being fatigued with travelling, he laid himself down on the banks of the river, in a grassy place, to refresh them with rest and rich pasture.
When sleep had overpowered him, satiated with food and wine, a shepherd of the place, named Cacus, presuming on his strength, and charmed with the beauty of the oxen, wished to purloin that booty, but because, if he had driven them forward into the cave, their footsteps would have guided the search of their owner thither, he therefore drew the most beautiful of them, one by one, by the tails, backwards into a cave.

Hercules, awaking at day-break, when he had surveyed his herd, and observed that some of them were missing, goes directly to the nearest cave, to see if by chance their footsteps would lead him thither.

But when he observed that they were all turned from it, and directed him no other way, confounded, and not knowing what to do, he began to drive his cattle out of that unlucky place.

Upon this, some of the cows, as they usually do, lowed on missing those that were left; and the lowings of those that were confined being returned from the cave, made Hercules turn that way.
And when Cacus attempted to prevent him by force, as he was proceeding to the cave, being struck with a club, he was slain, vainly imploring the assistance of the shepherds.