But, to be just, it is not only wealth that breeds these fine sights, it is also a certain temper in the owner. And I knew very well that though I had three million pounds and some odd pence over I should never have a tidy boat. I could not sleep in such a thing.
Anyhow, there she came, thundering down the tide. I had thought she would pass me in her rush of speed, and I held up until she should have done so, for it would have been dangerous to have tried to go about with such a weight of movement coming on us, and our own course half out of control, dependent only upon occasional slight splashes of wind from over the cliff. But the motorboat slowed down, and its owner asked us if we wanted a tow up to the town. We met him with gratitude: he was of that very considerable class known as the Good Rich, with whom are the Penitent Thieves, the Reformed Drunkards, the Sane Professors, the Womanly Furies, and all other candidates for heaven. We threw a line aboard him and made fast, and so went up just as the darkness came, and dropped anchor in the pool under a neat little city, which lived by the traffic of that difficult waterway with its strange tide. But, then, all tides are strange.
My companion and I sat in the hatch that evening under quiet stars, smoking pipes, watching that most pleasant of sights, the home lights of a little harbour town, and their trembling reflections in the water, the slight swaying of the masts of fishing-boats moored by the quay. We wondered together at the way the tide had behaved when it tried to baulk us of our entry, and we decided before we slept that it was better never to reason upon tides, nor even to accept print upon them, but to take them blindly as they came, for “No man living can understand the tides,” said my companion, and, as he said it, he sighed; and he was right.
No man living can understand the tides. And the mystery of the tides is as good a corrective as one could find to our deadening pride in exact measurements, and to the folly of attempting to base real knowledge upon mere calculation: our pretence to a universal science, and to a modern omniscience upon the Nature of Things.
The bungling of landsmen in the matter of tides begins with Galileo. That worthy had a talent for getting off the rails and he bungled on the tides as he did on comets. Then came Newton. Why does the tide flow every twelve hours on the average, instead of every twenty-four? If it be true, as I suppose it roughly is, that the moon is the main puller of the tides (helped and hindered a little by the sun, and certainly by other forces of which we know nothing), then there ought to be a tide every twenty-four hours. Put a lot of fluid round a solid sphere, and set a pull, working from some point well outside the fluid. It looks as though the fluid would heap up towards the pull. It being discovered that the fluid heaped up not only towards the pull, but also on the other side of the solid sphere, away from the pull, the mind of man could not rest without proclaiming an explanatory dogma, and we were told (by Newton among others) that the pull not only heaped up the fluid towards itself, but also dragged away the earth from the water on the far side. Indeed, Newton worked it out and proved that it was so.
If the phenomenon had been the other way about, if the fluid had behaved as one would expect it to behave, and had heaped up only on the side towards the pull—oh! believe me! a formula would have been discovered to explain that with just as much ease as the formula which has been drawn up to explain the real state of affairs.
But this original false dogma is not of very much interest compared with the immense complexity of the tides, and the inability to follow them with any sort of completeness by reason of that complexity.
For the tides behave in the most inexplicable fashion. They follow, of course, certain habits, which we know (from the observation of liquids everywhere) to be in the nature of a liquid in movement. They pile up higher as they rush up funnels. They are checked by ridges, they form eddies—and all the rest of it. But they are continually playing anomalous tricks; and anyone who tries to work up a theory of the tides makes a fool of himself: still more does any poor sailing-man do so who uses science to discover what the tide may be doing in a place he has not yet tried. He makes not only a fool of himself, but also, very probably, shipwreck.
Why should a tide run three hours late inshore along the Bight of Sussex? We are told it is an eddy. Of course it is. But why an eddy of such extraordinary retardation? The main Channel tide runs from headland to headland. It is “true,” as the phrase goes, at Saint Catharine’s, and again at Beachy and so on to Dungeness; and if you are going up-Channel outside, you carry it with you “true” all the way. That it should be a little retarded in the Bight of Sussex one might understand, but that Bight is very shallow (it is only fifteen miles from the deepest point by Shoreham to the outer line), and yet you have this three hours’ difference! The tide still runs hard
