The Greek geographer Strabo lived at the end of the first century BC and in the early first century AD. He devoted his life to study, writing and travelling.

Geographica III,2,6
The abundance of the exports of Turdetania is indicated by the size and the number of the ships; for merchantmen of the greatest size sail from this country to Dicaearchia, and to Ostia, the seaport of Rome; and their number very nearly rivals that of the Libyan ships.

Translation: Loeb, H.L. Jones.

Geographica V,2,1
Now the country of the Latini lies between the coastline that stretches from Ostia as far as the city of Sinuessa and the country of the Sabini (Ostia is the port-town of the Roman navy the port into which the Tiber, after flowing past Rome, empties), although it extends lengthwise as far as Campania and the mountains of the Samnitae.

Translation: Loeb, H.L. Jones.

Geographica V,3,2
It is said that Aeneas, along with his father Anchises and his son Ascanius, after putting in at Laurentum, which was on the shore near Ostia and the Tiber, founded a city a little above the sea, within about twenty-four stadia from it.

Translation: Loeb, H.L. Jones.

Geographica 231-232
Ostia is harbourless on account of the silting up which is caused by the Tiber, since the river is fed by numerous small streams. Now although it means danger for the merchant ships to anchor far out in the surge, still the prospect of gain prevails; and in fact the plentiful supply of tenders which receive the cargoes and bring back others in exchange makes it possible for the ships to sail away quickly before they touch the river, or else, after being partly relieved of their cargoes, they sail into the Tiber and run inland as far as Rome.

Translation: R. Meiggs, Roman Ostia, p. 52.