He was called Loulou. His body was green, his head blue, the tips of his wings were pink and his breast was golden. Again alas and alack! The Correct Magnetic Course was not the Compass Course. There was another sly little devil lying in wait to trip me up and land me smashing on the reefs of Vatu Leile. This little devil went by the name of Deviation. I read:!

So the Snark started on her long voyage without a navigator. We beat through the Golden Gate on April 23, and headed for the Hawaiian Islands, twenty-one hundred sea-miles away as the gull flies. And the outcome was our justification. We arrived. And we arrived, furthermore, without any trouble, as you shall see; that is, without any trouble to amount to anything. To begin with, Roscoe tackled the navigating. He had the theory all right, but it was the first time he had ever applied it, as was evidenced by the erratic behaviour of the Snark. Not but what the Snark was perfectly steady on the sea; the pranks she cut were on the chart. On a day with a light breeze she would make a jump on the chart that advertised “a wet sail and a flowing sheet,” and on a day when she just raced over the ocean, she scarcely changed her position on the chart. Now when one’s boat has logged six knots for twenty-four consecutive hours, it is incontestable that she has covered one hundred and forty-four miles of ocean. The ocean was all right, and so was the patent log; as for speed, one saw it with his own eyes. Therefore the thing that was not all right was the figuring that refused to boost the Snark along over the chart. Not that this happened every day, but that it did happen. And it was perfectly proper and no more than was to be expected from a first attempt at applying a theory. “No harbour this place,” he announced, shaking his head ominously.

“We sailed from Suva, in the Fijis, didn’t we?” it demands, and logical mind agrees. “And Suva is in east longitude?” Again logical mind agrees. “And we sailed west (which would take us deeper into east longitude), didn’t we? Therefore, and you can’t escape it, we are in east longitude.” And now to the particular physics of surf-riding. Get out on a flat board, six feet long, two feet wide, and roughly oval in shape. Lie down upon it like a small boy on a coaster and paddle with your hands out to deep water, where the waves begin to crest. Lie out there quietly on the board. Sea after sea breaks before, behind, and under and over you, and rushes in to shore, leaving you behind. When a wave crests, it gets steeper. Imagine yourself, on your hoard, on the face of that steep slope. If it stood still, you would slide down just as a boy slides down a hill on his coaster. “But,” you object, “the wave doesn’t stand still.” Very true, but the water composing the wave stands still, and there you have the secret. If ever you start sliding down the face of that wave, you’ll keep on sliding and you’ll never reach the bottom. Please don’t laugh. The face of that wave may be only six feet, yet you can slide down it a quarter of a mile, or half a mile, and not reach the bottom. For, see, since a wave is only a communicated agitation or impetus, and since the water that composes a wave is changing every instant, new water is rising into the wave as fast as the wave travels. You slide down this new water, and yet remain in your old position on the wave, sliding down the still newer water that is rising and forming the wave. You slide precisely as fast as the wave travels. If it travels fifteen miles an hour, you slide fifteen miles an hour. Between you and shore stretches a quarter of mile of water. As the wave travels, this water obligingly heaps itself into the wave, gravity does the rest, and down you go, sliding the whole length of it. If you still cherish the notion, while sliding, that the water is moving with you, thrust your arms into it and attempt to paddle; you will find that you have to be remarkably quick to get a stroke, for that water is dropping astern just as fast as you are rushing ahead. “All right,” said I; “but put some corrosive sublimate on it just the same. And some two or three weeks from now, when it is well and you have a scar that you will carry to your grave, just forget about the purity of your blood and your ancestral history and tell me what you think about yaws anyway.”