It is true that peace was made, but Rome was forced to agree not to use iron except in cultivating the earth, and she lost ten of her thirty "regions," being all the territory that the kings had conquered on the west bank of the Tiber. [Footnote: See Niebuhr's _Lectures_, chapter xxiv.] Tarquin had been foiled in his attempts to regain his throne, but still he tried again, the last time having the aid of his son-in-law, Mamilius of Tusculum. It was a momentous juncture. The weakened Romans were to encounter the combined powers of the thirty Latin cities that had formerly been in league with them. They needed the guidance of one strong man; but they had decreed that there should never be a king again, and so they appointed a "dictator" with unlimited power, for a limited time. We shall find them resorting to this expedient on other occasions of sudden and great trouble. A fierce struggle followed at Lake Regillus, in which the Latins were turned to flight through the intervention of Castor and Pollux, who fought at the head of the Roman knights on foaming white steeds. There was no other quarter to which Tarquinius could turn for help, and he therefore fled to Cumæ, where he died after a wretched old age. A temple was erected on the field of the battle of Lake Regillus in honor of Castor and Pollux, and thither annually on the fifteenth of July the Roman knights were wont to pass in solemn procession, in memory of the fact that the twins had fought at the head of their columns in the day of distress when fortune seemed to be about to desert the national cause. At this battle Caius Marcius, a stripling descended from Ancus Marcius, afterwards known as Coriolanus, received the oaken crown awarded to the man who should save the life of a Roman citizen, because he struck down one of the Latins, in the presence of the commander, just as he was about to kill a Roman soldier. In the year 504 B.C., there was in the town of Regillum, a man of wealth and importance, who, at the time of the war with the Sabines, had advocated peace, and as his fellow-citizens were firmly opposed to him, left them, accompanied by a long train of followers (much as we suppose the first Tarquin left Tarquinii), and took up his abode in Rome. The name of this man was Atta Clausus, or perhaps Atta Claudius, but, however that may be, he was known at Rome as Appius Claudius. He was received into the ranks of the patricians, ample lands were assigned to him and his followers, and he became the ancestor of one of the most important Roman families, that of Claudius, noted through a long history for its hatred of the plebeians. His line lasted some five centuries, as we shall have occasion to observe. VI. THE ROMAN RUNNYMEDE.