Standing upon the shoulder of the Lizard peninsula, and looking eastward upon a clear summer’s day, I misread the Dodman. Now from land this is unpardonable, because one has on land points of reference, and, indeed, had I been careful, and with a map before me, I could not have made such an error. But from the sea it is a thing that happens very much oftener than sailing-men are willing to admit.
I remember once, many years ago, coming in from far outside, and making sure of a point of French land, which I thought I knew by heart. I saw a characteristic dip, and, in front of it, the nearer lump of land which I knew for an island, and then there was a gap, or “V,” which I could have sworn to be the harbour town I knew. It is true that I was surprised to find it lying so far over my starboard bow. I had thought it to be right before me, but I trusted my eyes rather than my reckoning. As we drew nearer I found all that inference in error. I had, indeed, failed in my reckoning somewhat, but it was the other way about, and the place I was looking for lay more than twenty miles to the eastward, and, when I first saw land, my harbour was hidden below the last horizon, over the port bow.
One would think that the outline of a headland, once one had known it from a particular side, was an unmistakable thing, and one would think that the same would be true of a characteristic range of hills seen lengthwise, or even of the entrance to a valley harbour.
After all, the same sort of thing is at once recognisable by land: a man does not mistake the Wrekin, or the Malvern Hills.
But at sea, for some mysterious reason, you never can be sure; and that is why such pains are taken in the elaborate descriptions and plans of sailing directions, and in the little pictures which they make in the official books. It is not only a matter of what is called today “visibility,” though it is true that the thickness of the air makes a great difference to one’s judgment of distance. No matter what the conditions, the most absurd mistakes can be made, and are made continually, and that by practised men. It was only the other day that I mistook Grisnez for the end of the cliff some miles to the east of it above the flat of Calais. You would think that Beachy Head, seen from up-Channel looking westward, was unmistakable; for it has the exact outline of a hippopotamus, with its little ear and fat forehead and snout, and there is a long flat before it, so that anything rising up, one would think, was bound to be Beachy Head, but it is not so. A man who has been knocking about the Channel at night, and does not quite know where he is, except that he is somewhere off the Sussex coast, may (it sounds absurd, but it is true) take Fairlight in a haze for Beachy Head, or (coming eastwards) he may catch in a dull dawn the low cliffs beyond Newhaven, and, if the thick air hides Beachy from him, he may take these for that headland.
Much more excusable, and yet much more common than mistaking the outline of hills, or a headland, is the mistaking of a light. All of them have carefully marked spaces of time, a flash for so many seconds, or a change of colour, or whatnot. But a man cannot always be bothered to time these things, and in a little boat under a strain he may not be able to do so. But the very commonest form of error in this, as in everything else, comes from an absolute and false certitude. You say to yourself, “There is no doubt at all that that light is such-and-such a light.” You have been waiting to pick it up, and when you pick up a light you are certain it is that light, unless the timing of it is quite grossly different from what you expected. But you may be quite wildly wrong. I suppose no one will believe me when I tell them that I have known Saint Catherine’s mistaken for the Hogue.
But there are more absurd cases still. Many years ago, a ship called the Mohegan struck the rocks called the Manacles, which are inside Black Head, in Cornwall. She was going down the Channel, and there would seem to be no question of danger in the matter. The Lizard Light is there, staring plain enough; one only has to keep it well on the starboard bow going down-Channel, and one is sure to miss England. One cannot hit the Manacles so long as the light is well off one’s starboard bow, for they lie inside the Point. Therefore, when the Mohegan struck, she must have had the Lizard Light on her port bow, and the lookout man, and the man steering, and the man setting the course, and the man in command on the bridge must have known perfectly well (one would think) that the situation was impossible. Yet strike she did, and no one has ever really explained how it happened.
There are some of these mistakes which cannot be avoided, and which are explainable, not by any failure of the human reason, but by a very natural confusion between similar things. Thus, anyone runs a risk at Dungeness on account of the two lighthouses there; I mean anyone going up-Channel, and aiming at giving that point a very close shave.
Dungeness grows out to sea at a certain rate, so that, at long intervals, a new lighthouse has to be built to mark its extremity. Though it grows outwards thus into the Channel, the end
