There are from the continental side no good starting-points from the coast immediate to Gris Nez; it is rocky, uncertain, and unprovided with inlets. Calais, to the east, was probably the earliest port of departure. Here, at least, is a hole in the land, and there are two considerations which make it probable that the earliest men would start from this side of Gris Nez rather than the other. The first is that they could run as far as possible sheltered from the prevailing winds--for these come from the west and south-west; with such winds they would, up to the point of Gris Nez, be in calm water, while if they started from Boulogne they would have no such advantage. The second is that they could run with an ebb tide down to Gris Nez, and then if the wind failed so that they could not cross in one tide, the flood would be to their advantage when they neared the English coast. It would take them up again under lee of the land, round the South Foreland to Sandwich. From Boulogne they would have to start without shelter, run up on a flood tide, and if they missed that tide they might have drifted down again under the full force of the prevailing wind, any distance along the English coast. Boulogne ultimately became the principal port of exit and entry. It was certainly so used by the Romans; but Calais must, I think, have been the earliest starting-point. From Calais, then, the run would have been made to the English shores. But when we note the conditions of this corner of England several things strike us. In the first place, the number of the harbours. These included originally Winchelsea, Rye, the Portus Lemanis, Dover, Richborough, Reculvers; in all six harbours in this small stretch of coast. If we look at the place to-day we find something similar; men will attempt Rye, they will make Folkestone or Dover for choice; Sandwich at a pinch in quite small boats. Ramsgate after Dover gives the best of modern opportunities. There is something more. Most of these harbours were and are bad; most of them were and are artificial. It is true that in ancient times the strait which divided the Island of Thanet from the mainland afforded an excellent shelter at either end. Reculvers was at one end, and the island of Rutupiae (Richborough) at the other. If one could not get into Richborough and was carried round the North Foreland, one could always beat round into Reculvers; but Dover was not much of a harbour; the Port Lemanis must have been open to the south wind and was probably very shallow; Rye, though better than it is now, was never a steep shore, and was always a difficult place to make. The modern harbours may, without exaggeration, be described as every one of them artificial. Folkestone is distinctly so. The old harbour of Dover has silted up centuries ago, and the gas works of the town are built over its site. Ramsgate would be of no value but for the two constructed piers.