The third division contains the Tyrrhenians, who dwell next the former, and inhabit the plains extending to the Tiber, which river, as far as its outlet, washes the side towards the east, the opposite side being washed by the Tyrrhenian and Sardinian sea. The Tiber flows from the Apennines, and is swelled by many rivers; it flows partly through Tyrrhenia, dividing it in the first instance from Ombrica,[1679] afterwards from the Sabini and the Latini, who are situated next Rome as far as the sea-coast; so that these countries are bounded in their breadth by the river [Tiber] and the Tyrrhenians, and in their length by each other. They extend upwards towards the Apennines which approach the Adriatic. The first[1680] are the Ombrici, after these the Sabini, and finally the inhabitants of Latium. They all commence from the river. The country of the Latini extends on one side along the sea-coast from Ostia to the city of Sinuessa, on the other it is bounded by the land of the Sabini, (Ostia is the port of Rome, through which the Tiber passes in its course,) it [CAS. 219] extends in length as far as Campania and the Samnitic mountains. The country of the Sabini lies between the Latini and the Ombrici, it likewise extends to the Samnitic mountains, but approaches nearer to the Apennines inhabited by the Vestini, the Peligni, and the Marsi. The Ombrici lie between the country of the Sabini and Tyrrhenia, but extend beyond the mountains as far as Ariminum,[1681] and Ravenna. The Tyrrheni, commencing from their own sea and the Tiber, extend to the circular chain of mountains which stretches from Liguria to the Adriatic. We will now enter into a detailed account, commencing with these.