Having given these instructions, Cæsar went into Italy to hold the assembly of Citerior Gaul, and afterwards started for Illyria, on the news that the Pirustes (_peoples of the Carnic Alps_) were laying the frontier waste. Immediately on his arrival, by prompt and energetic measures, he put a stop to these disorders, and re-established tranquillity.[364] [Sidenote: Points of Embarking and Landing. Date of the Arrival in Britain.] VIII. We have indicated, in the preceding pages, Boulogne as the port at which Cæsar embarked, and Deal as the point where he landed in Britain. Before explaining our reasons, it will not be useless to state that in this first expedition, as well as in the second, the account of which will follow, the places of embarking and landing were the same. In the first place, the terms used in the “Commentaries” lead us to suppose it; next, as we will endeavour to prove, he could only start from Boulogne; and lastly, according to the relation of Dio Cassius, he landed on both occasions at the same spot.[365] It is, then, convenient to treat here the question for both expeditions, and to anticipate in regard to certain facts. Writers of great repute have placed the Portus Itius, some at Wissant, others at Calais, Etaples, or Mardyke; but the Emperor Napoleon I, in his _Précis des Guerres de César_, has not hesitated in preferring Boulogne. It will be easy for us to prove in effect that the port of Boulogne is the _Portus Itius_, which alone answers the necessities of the text, and at the same time satisfies the requirements of a considerable expedition.[366]