At the time of the discussion our relations with France were by no means so friendly as they are now, and it was naturally to France only that we alluded, since they would already hold one end of the tunnel. We need not now discuss any other nation, since any other would have to seize both ends by surprise, and afterwards retain them, which is surely inconceivable. We are now bound in close ties of friendship and mutual interest to France. We have no right to assume that we shall always remain on as close a footing, but as our common peril seems likely to be a permanent one, it is improbable that there will be any speedy or sudden change in our relations. At the same time, in a matter so vital as our hold upon the Dover end of the tunnel, we could not be too stringent in our precautions. The tunnel should open out at a point where guns command it, the mouth of it should be within the lines of an entrenched camp, and a considerable garrison should be kept permanently within call. The latter condition already exists in Dover, but the numbers might well be increased. As an additional precaution, a passage should be driven alongside the tunnel, from which it could, if necessary, be destroyed. This passage should have an independent opening within the circle of a separate fort, so that the capture of the end of the tunnel would not prevent its destruction. With such precautions as these, the most nervous person might feel that our insular position had not really been interfered with. The strong fortress of the Middle Ages had a passage under the moat as part of the defence. This is our passage. Could an enemy in any way destroy it in time of war? It would, as I conceive, be sunk to a depth of not less than two hundred feet below the bed of the ocean. This ceiling would be composed of chalk and clay. No explosive from above could drive it in. If it were designed on a large scale--and, personally, I think it should be a four-line tunnel, even if the cost were doubled thereby--no internal explosion, such as might be brought about by secreting explosive packets upon the trains, would be likely to do more than temporarily obstruct it. If the very worst happened, and it were actually destroyed, we should be no worse off than we are now. As to the expense, if we are driven into a war of this magnitude, a few millions one way or the other will not be worth considering.