Sibylline Books
In 143 BC, under the consulship of Appius Claudius Pulcher and Quintus Caecilius Metellus Macedonicus, the Decemvirs consulted the Sibylline Books and found that it was the Aqua Anio Vetus's water that led to the Capitolinus. They reported their conclusions to the Senate. Three years later, in 140 BC, under the consulship of Quintus Servilius Caepio and Gaius Laelius Sapiens, this matter was again brought before the Senate. The decemvirs' opinion prevailed, and the aqueduct's water was rerouted to Capitolinus.