THE RIVER TIBER, ROME'S FOUNTAIN OF LIFE

"The river widens considerably as it reaches the sea and forms large bays, like the best sea harbours. And, most surprising of all, it is not cut off from its mouth by a barrier of sea sand, which is the fate even of many large rivers."

"Ships with oars, however large, and merchantmen with sails up to 3,000 (amphorae) capacity enter the mouth itself and row or are towed up to Rome; but larger ships ride at anchor outside the mouth and unload and reload with the help of river vessels."
(Dionysius of Halicarnassus)