Sulla sent a letter to the senate, announcing the close of the war and his intention to return, in the course of which he took occasion to recount his services to the republic, from the time of the war with Jugurtha to the conquest of Mithridates, and announced that he should take vengeance upon his enemies and upon those of the commonwealth. The senate was alarmed, and proposed to treat with him for peace, but Cinna hastened to oppose the arrogant conqueror with force. He was, however, assassinated by his own soldiers. On the sixth of July, after the arrival of Sulla at Brundusium (B.C. 83), Rome was thrown into a state of consternation by the burning of the capitol and the destruction of the temple of Jupiter Capitolinus, with the Sibylline oracles, those valuable books which had directed the counsels of the nation for ages, and the close of a historic era approached. [Footnote: Ambassadors were afterwards sent to various places in Greece, Asia, and Italy, to make a fresh collection, and when the temple was rebuilt it was put in the place occupied by the lost books.] Sulla easily marched in triumph through lower Italy on his way to Rome, for his opponents were not well organized, but it was not until months had passed that the fierce struggle was decided. He was besieging Præneste, when the Samnites, after finding that they could not relieve it, marched directly upon Rome. Sulla followed them, and a bloody battle was fought at the Colline gate, on the northern side of the city. It was a fight for the very existence of Rome, for Pontius Telesinus, commander of the Samnites, declared that he intended to raze the city to the ground. Fifty thousand are said to have fallen on each side, and most of the leaders of the party of Marius perished or were afterward put to death. All the Samnites (8,000) who were taken were collected by Sulla in the Campus Martius and ruthlessly butchered.