Then, dramatically, the flow of water stops entirely. Attilius concludes that the aqueduct must be blocked somewhere close to Mount Vesuvius, since reports claim a shut down of the system just before Nola, meaning that towns from there through Napoli and Misenum are without any water supply. With aid from Pliny the Elder, whose fleet is docked at Misenum, Attilius assembles an expedition to travel to Pompeii, the closest town still being supplied with water, and then on to the blocked section of the Aqua Augusta.