But in our particular case there was another perturbing factor. The sun, in its annual march north through the heavens, was increasing its declination. On the 19th parallel of north latitude in the middle of May the sun is nearly overhead. The angle of arc was between eighty-eight and eighty-nine degrees. Had it been ninety degrees it would have been straight overhead. It was on another day that we learned a few things about taking the altitude of the almost perpendicular sun. Roscoe started in drawing the sun down to the eastern horizon, and he stayed by that point of the compass despite the fact that the sun would pass the meridian to the south. I, on the other hand, started in to draw the sun down to south-east and strayed away to the south-west. You see, we were teaching ourselves. As a result, at twenty-five minutes past twelve by the ship’s time, I called twelve o’clock by the sun. Now this signified that we had changed our location on the face of the world by twenty-five minutes, which was equal to something like six degrees of longitude, or three hundred and fifty miles. This showed the Snark had travelled fifteen knots per hour for twenty-four consecutive hours—and we had never noticed it! It was absurd and grotesque. But Roscoe, still looking east, averred that it was not yet twelve o’clock. He was bent on giving us a twenty-knot clip. Then we began to train our sextants rather wildly all around the horizon, and wherever we looked, there was the sun, puzzlingly close to the sky-line, sometimes above it and sometimes below it. In one direction the sun was proclaiming morning, in another direction it was proclaiming afternoon. The sun was all right—we knew that; therefore we were all wrong. And the rest of the afternoon we spent in the cockpit reading up the matter in the books and finding out what was wrong. We missed the observation that day, but we didn’t the next. We had learned. 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.!

We climbed higher and higher in the valley, our unshod stallions picking their steps on the disintegrating trail, which led in and out through the abandoned pae-paes and insatiable jungle. The sight of red mountain apples, the ohias, familiar to us from Hawaii, caused a native to be sent climbing after them. And again he climbed for cocoa-nuts. I have drunk the cocoanuts of Jamaica and of Hawaii, but I never knew how delicious such draught could be till I drank it here in the Marquesas. Occasionally we rode under wild limes and oranges—great trees which had survived the wilderness longer than the motes of humans who had cultivated them. After she had made a curtsey at the threshold, she would walk up the aisle between the double lines of chairs, open Madame Aubain’s pew, sit down and look around.

“Never mind,” said Charmian to me; “just think of that bow and of being hove to on the China Seas.” Some day, when I have made a lot of money, I’m going to build a big ship, with room in it for a thousand volunteers. They will have to do all the work of navigating that boat around the world, or they’ll stay at home. I believe that they’ll work the boat around the world, for I know that Adventure is not dead. I know Adventure is not dead because I have had a long and intimate correspondence with Adventure. His parents always told him to get something out of her, either a package of brown sugar, or soap, or brandy, and sometimes even money. He brought her his clothes to mend, and she accepted the task gladly, because it meant another visit from him.