At the center of the Forum a low wall surrounded a water hole near a cluster of three plants: a vine, a fig tree and an olive bush. This was the Pool of Curtius, where in Rome’s early years a chasm had suddenly appeared. The prophetic Sibylline Books, an antique collection of oracular utterances in Greek hexameters which the Romans consulted in times of national crisis, advised that the gap in the ground would close only when it received what the Roman people valued most highly. From that day forward the earth would produce an abundance of what it had taken in. People threw cakes and silver
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