Hercules and the Cattle of Geryon

At a Glance

• Central figures: Hercules, son of Jupiter; Geryon, the three-bodied king of Erytheia; Cacus, a fire-breathing giant dwelling on the Aventine Hill.
• Setting: The far western island of Erytheia, then the long cattle-drive eastward through Iberia, Gaul, and Liguria, ending at the future site of Rome along the Tiber; drawn from Livy’s Ab Urbe Condita, Virgil’s Aeneid (Book VIII), and Ovid’s Fasti.
• The turn: Hercules kills Geryon and drives his cattle across the known world, only to have the giant Cacus steal part of the herd from the Palatine pasture by dragging the animals backward into his cave.
• The outcome: Hercules discovers the theft, tears open Cacus’s cave, and kills him; the local people, led by Evander, honor Hercules with a sacrifice at the site.
• The legacy: The Ara Maxima - the Great Altar of Hercules in the Forum Boarium - where Roman merchants swore oaths and tithed a tenth of their profits for centuries afterward.

Eurystheus wanted the cattle. That was the tenth labor - not to slay a beast or fetch a girdle, but to cross the western ocean and bring back the red oxen of Geryon, who pastured them on the island of Erytheia at the edge of the world. It was a task designed for failure. Geryon was not one king but three: three torsos fused at the waist, six arms, three heads, each thinking its own thoughts. He kept a herdsman named Eurytion and a two-headed dog called Orthrus, and his cattle were the color of sunset.

Hercules went anyway. He sailed west in a golden cup borrowed from Sol and landed on Erytheia under a sky the color of blood.

Orthrus and Eurytion

The dog came first. Orthrus had two skulls and twice the hearing - he caught Hercules’s scent before the hero cleared the beach. He charged low and fast, both mouths open. Hercules swung his club once. Orthrus did not get up.

Eurytion the herdsman ran at the sound, bronze-tipped staff in hand. He died on the same ground, struck down before he could call for his master. Hercules stepped over the body and walked into the herd. The red cattle lowed and shifted, their flanks catching the last of the western light. He began to gather them.

Geryon came armored. Three shields. Three spears. Three helmets crested with horsehair, each face set with a different expression - one snarling, one calm, one almost curious. He moved with a strange grace for something so wide, his six legs working in a rhythm that looked like a centipede’s.

Hercules did not wait for the charge. He drew the bow - the Hydra-poisoned arrows, tipped with venom that had no cure - and loosed three shafts, one after the other, each finding a gap where shield met breastplate. Geryon staggered. Three mouths opened. No sound came from any of them. He fell the way a building falls, slow and sideways, and the ground shook when he landed.

The Long Drive

The journey back was longer than the fight. Hercules drove the red cattle east across Iberia, up through the passes of southern Gaul, and down into the Italian peninsula. He moved like a rancher, not a hero - prodding stragglers with his club, fording rivers, sleeping in the open with the herd circled around him. The country changed beneath his feet: scrub became forest, forest became marsh, marsh became the hard volcanic ground of Latium.

He came to the Tiber. On the far bank rose the hills that would one day hold Rome, though in that time only a few settlements clung to the ridges. One of these belonged to Evander, an Arcadian exile who had built a small town on the Palatine and called it Pallanteum. Hercules forded the river, drove the cattle up into the low pasture between the Palatine and the Aventine, and slept.

The Cave on the Aventine

Cacus lived in a cave on the Aventine Hill. He was a son of Vulcan - half giant, half something worse. Fire poured from his throat. The ground around his cave was scattered with bones and skulls, and his doorposts were hung with the faces of men he had killed.

He watched Hercules sleep. He watched the cattle graze. And in the dark, moving on bare feet that left scorched prints in the grass, he crept to the herd and selected four bulls and four heifers - the finest of the lot. Then he did something clever. He dragged them backward by their tails into his cave, so that the hoofprints on the ground pointed away from his door rather than toward it.

Hercules woke at dawn and counted the herd. Eight missing. He circled the pasture, reading the ground the way a hunter reads it, and found the tracks leading away from the Aventine - as though the cattle had walked off on their own, heading south. He started to follow.

Then one of the stolen cows bellowed from inside the hill. The sound was muffled, deep, coming from under the rock, but it was unmistakable. Hercules stopped. He turned toward the Aventine.

The Death of Cacus

The cave mouth was sealed with a boulder so massive that twenty yoke of oxen could not have shifted it. Cacus had rolled it into place behind him, and he sat in the dark behind it, breathing smoke.

Hercules climbed the hill. He found the place where the rock was thinnest - a shelf near the summit, cracked by old earthquakes - and he tore it open. He ripped the stone apart with his hands, peeling back the roof of the cave the way a man peels bark from a log. Light flooded in. For the first time, Cacus was visible: crouched in the back of his den, the stolen cattle behind him, his mouth already filling with fire.

He breathed. A column of flame and black smoke erupted upward through the broken ceiling. Hercules dropped into the cave through the smoke. He could not see. He did not need to. He found Cacus by the heat of him and got both hands around the giant’s throat.

Cacus clawed and burned. The flames scorched Hercules’s skin, blackened his lion-hide cloak. Hercules did not let go. He squeezed until the fire choked out and the giant’s three eyes - Virgil says only two, but the older tradition gives him three - went dark.

He dragged the body into the daylight and left it on the hillside for the birds.

The Altar in the Forum Boarium

The people of Pallanteum came down from the Palatine. Evander, who knew the prophecies and recognized the son of Jupiter for what he was, ordered a sacrifice. A bull from the recovered herd was killed on the spot, and an altar was raised - rough stone, nothing grand, set on the flat ground between the two hills where the cattle market would later stand.

This was the Ara Maxima, the Great Altar. It became the oldest cult site in what would become Rome - older than the she-wolf, older than the walls. Roman merchants swore by it. They tithed a tenth of their profits there, echoing the tithe Hercules himself paid from the herd. The Potitii and the Pinarii, two ancient families, kept the rites for generations, and no women were permitted at the sacrifice. No dogs were allowed near the altar either - because Hercules remembered Orthrus.

The red cattle went on to Eurystheus. The altar stayed. It stood in the Forum Boarium for as long as there was a Rome to stand in.