The great northern road from Rome crosses the Tiber at the Mulvian Bridge some two miles above the city. Cicero set two of the prætors in ambush with armed bands in farm-houses on each side of the water. These waited until the Allobroges and their companions were crossing in the darkness; then advancing simultaneously they occupied the two ends of the bridge. Thus not only were the letters seized, but the whole party was caught on the bridge. They were conveyed to Rome and deposited at the consul's house about daybreak (Dec. 3d). Cicero forthwith summoned to his presence Gabinius, Cethegus, Statilius, and Lentulus. Messages were likewise sent to some of the principal senators, who hurried to the consul's house. Contrary to the advice of these, Cicero declined to open the letters. He preferred at once to convoke the Senate, so that the evidence might come out in open court. In the meantime, acting on a hint from the Allobroges, he sent one of the prætors to search the house of Cethegus, where a store of swords and daggers was soon found. These were immediately seized.
As soon as the Senate had assembled, Cicero took Lentulus by the hand and led him into the House. This show of gentle force exercised by the consul in person was considered due to the dignity of the prætor; the other conspirators, being but private men, were arrested with less ceremony. Volturcius was first admitted to give evidence under promise of pardon, and detailed the instructions with which he was charged for Catiline, who was to be urged to advance as soon as possible on Rome, so as to be before
