C. Julius Caesar, Gallic War

These things being known [to him], Caesar orders the legions and cavalry to be recalled and to cease from their march; he himself returns to the ships: he sees clearly before him almost the same things which he had heard of from the messengers and by letter, so that, about forty ships being lost, the remainder seemed capable of being repaired with much labor. Therefore he selects workmen from the legions, and orders others to be sent for from the continent; he writes to Labienus to build as many ships as he could with those legions which were with him. He himself, though the matter was one of great difficulty and labor, yet thought it to be most expedient for all the ships to be brought up on shore and joined with the camp by one fortification. In these matters he employed about ten days, the labor of the soldiers being unremitting even during the hours of night. The ships having been brought up on shore and the camp strongly fortified, he left the same forces as he did before as a guard for the ships; he sets out in person for the same place that he had returned from. When he had come thither, greater forces of the Britons had already assembled at that place, the chief command and management of the war having been intrusted to Cassivellaunus, whose territories a river, which is called the Thames, separates, from the maritime states at about eighty miles from the sea. At an earlier period perpetual wars had taken place between him and the other states; but, greatly alarmed by our arrival, the Britons had placed him over the whole war and the conduct of it.