The brambles at the foot of the hill were set on fire. The flames spread upward, heading directly for the cave. Then a wind blew up from the Tiber and drove the flame this way and that. Embers spiraled high in the air, blew across the Spinon, and ignited the thatched roof of a hut. The flames spread from hut to hut. The settlers worked desperately to douse the flames with buckets of water from the river. When the fire at last burned itself out, the face of the hillside was scorched and black, but the cave was untouched and the monster unharmed.

It was decided that a watch should be set upon the cave, so that, if the monster descended, an alarm could be raised. Men and boys took turns throughout the day and night, training their eyes upon what little could be seen of the mouth of the cave from below.

One of Potitia’s cousins, a burly, hotheaded youth named Pinarius, boasted to her that he would put an end to Cacus once and for all. Caught up in his enthusiasm, Potitia confessed to her cousin that she had climbed to the cave many times. Scarcely believing her, Pinarius nonetheless accepted her explanation of how it could be done.

On the afternoon that it was his turn to keep watch on the cave, Pinarius decided to act. The day was hot and the air was heavy with sleep. The rest of the settlers dozed, except for Potitia, who knew of her cousin’s plan and gave him a kiss for luck before he began the climb.

From above, there came a faint noise that they took to be the sound of the monster snoring. Perhaps it was the buzzing of flies, drawn to the cave by blood and gore. Potitia remembered summer afternoons when she had dozed in the shadowy coolness of the cave. She could picture the monster asleep in that familiar, beloved place. The image made her shiver, yet it also pierced her with a sadness that she could not explain. For the first time she wondered where the monster came from. Were there others of his kind? Surely a mother had given birth to him. What fate had led him to the ruma, to become the most wretched of all living things?