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 ran down the lagoon from Langa Langa, between mangrove swamps, through passages scarcely wider than the Minota, and past the reef villages of Kaloka and Auki. Like the founders of Venice, these salt-water men were originally refugees from the mainland. Too weak to hold their own in the bush, survivors of village massacres, they fled to the sand-banks of the lagoon. These sand-banks they built up into islands. They were compelled to seek their provender from the sea, and in time they became salt-water men. They learned the ways of the fish and the shellfish, and they invented hooks and lines, nets and fish-traps. They developed canoe-bodies. Unable to walk about, spending all their time in the canoes, they became thick-armed and broad-shouldered, with narrow waists and frail spindly legs. Controlling the sea-coast, they became wealthy, trade with the interior passing largely through their hands. But perpetual enmity exists between them and the bushmen. Practically their only truces are on market-days, which occur at stated intervals, usually twice a week. The bushwomen and the salt-water women do the bartering. Back in the bush, a hundred yards away, fully armed, lurk the bushmen, while to seaward, in the canoes, are the salt-water men. There are very rare instances of the market-day truces being broken. The bushmen like their fish too well, while the salt-water men have an organic craving for the vegetables they cannot grow on their crowded islets.!

When we come to the Nile, why we can go up the Nile. We can go up the Danube to Vienna, up the Thames to London, and we can go up the Seine to Paris and moor opposite the Latin Quarter with a bow-line out to Notre Dame and a stern-line fast to the Morgue. We can leave the Mediterranean and go up the Rhône to Lyons, there enter the Saône, cross from the Saône to the Maine through the Canal de Bourgogne, and from the Marne enter the Seine and go out the Seine at Havre. When we cross the Atlantic to the United States, we can go up the Hudson, pass through the Erie Canal, cross the Great Lakes, leave Lake Michigan at Chicago, gain the Mississippi by way of the Illinois River and the connecting canal, and go down the Mississippi to the Gulf of Mexico. And then there are the great rivers of South America. We’ll know something about geography when we get back to California. Not so was the leper and his greatly misunderstood and feared disease treated during the middle ages in Europe. At that time the leper was considered legally and politically dead. He was placed in a funeral procession and led to the church, where the burial service was read over him by the officiating clergyman. Then a spadeful of earth was dropped upon his chest and he was dead-living dead. While this rigorous treatment was largely unnecessary, nevertheless, one thing was learned by it. Leprosy was unknown in Europe until it was introduced by the returning Crusaders, whereupon it spread slowly until it had seized upon large numbers of the people. Obviously, it was a disease that could be contracted by contact. It was a contagion, and it was equally obvious that it could be eradicated by segregation. Terrible and monstrous as was the treatment of the leper in those days, the great lesson of segregation was learned. By its means leprosy was stamped out.

There remained only one thing to do—to work south out of the trade and into the variables. It is true that Captain Bruce found no variables on his traverse, and that he “never could make easting on either tack.” It was the variables or nothing with us, and we prayed for better luck than he had had. The variables constitute the belt of ocean lying between the trades and the doldrums, and are conjectured to be the draughts of heated air which rise in the doldrums, flow high in the air counter to the trades, and gradually sink down till they fan the surface of the ocean where they are found. And they are found where they are found; for they are wedged between the trades and the doldrums, which same shift their territory from day to day and month to month. I took the wheel. The sailing-master watched me for a space. He was afraid of my youth, feared that I lacked the strength and the nerve. But when he saw me successfully wrestle the schooner through several bouts, he went below to breakfast. Fore and aft, all hands were below at breakfast. Had she broached to, not one of them would ever have reached the deck. For forty minutes I stood there alone at the wheel, in my grasp the wildly careering schooner and the lives of twenty-two men. Once we were pooped. I saw it coming, and, half-drowned, with tons of water crushing me, I checked the schooner’s rush to broach to. At the end of the hour, sweating and played out, I was relieved. But I had done it! With my own hands I had done my trick at the wheel and guided a hundred tons of wood and iron through a few million tons of wind and waves. “Fool!”