The advocates of Wissant identify the Itian promontory with Cape Gris Nez, well known to all passengers from Dover to Calais, and think that its name would be naturally shared with the neighbouring village of Wissant, which was probably at one time nearer to the sea than it is now. On the whole, though the arguments on both sides are pretty evenly balanced, those in favour of Wissant seem slightly to preponderate. II. Sailing, then, from some port in Picardy (either Boulogne or Wissant), Cæsar reached a part of the British coast which from his description looks like the chalk cliffs west of Dover. So far there is not much difference between the commentators, but what happened in the afternoon when, after his long halt, he found the wind and tide both in his favour, gave the signal to weigh anchor, and “having advanced (_progressus_) about eight miles from that place, brought his ships to a stand at a level and open beach”? Certainly the natural rendering of these words would seem to be that he went seven English miles up channel, and so if he had really anchored off Dover he would reach Deal, and that port would be, as it has been generally supposed to be, the scene of the world-historical landing of the first Roman soldiers in Britain. It must be admitted, however, that there are great difficulties in this hypothesis. The most careful and minute inquiries that have been made seem to show that on that day (the fourth before the full moon) and at that hour (3 P.M.), the tide, if it ebbed and flowed as it does now, would be setting down, not up, the channel: and accordingly many authors have come to the conclusion that Cæsar sailed westward for those seven miles and landed either at Hythe or Lymne (well known afterwards to the Romans as Portus Lemanis), or possibly at some such place as Appledore, now inland but then at the head of a very sheltered bay. The discussion is much complicated by the undoubted fact of the great changes which have taken place in that part of the coastline, and Dr. Guest is perhaps entitled to argue that these changes may have so altered the set of the tides as to allow him to postulate an eastward flowing tide when Cæsar weighed anchor in the afternoon. It must, however, remain for the present a disputed question: Cæsar’s word, “_progressus_,” on the one side, the present course of the tides on the other. On the whole it seems to me that the balance of probability is slightly in favour of Deal. Among the authors who have written on this question may be mentioned Airy, Lewin, Appach, in favour of some port west of Dover; Long, Merivale, Guest, in favour of Deal. Guest’s arguments are perhaps the most satisfactory, but justice should be done to the extremely painstaking little treatise of Appach (_Caius Julius Cæsar’s British Expeditions_, etc., 1868), who, however, surely attempts the impossible in his elaborate back-calculations of the winds and tides of two thousand years ago.