For some time they made good progress and then the light wind dropped and _Columbine_ rolled about in a glassy calm. The swell ran in long undulations that shone with reflected light, and there was no shade, for they lowered all sail to save the canvas from burning and chafing. The sun pierced the awning, and it was intolerably hot. They had reached the dangerous part of the old slavers' track; the belt of stagnant ocean where the south wind stopped and the north-east had not begun. The belt had been marked long since by horrors worse than wreck, for while the crowded brigs and schooners drifted under the burning sun, fresh water ran out and white men got crazed with rum while negroes died from thirst. Wyndham lounged one morning under the awning after his bath. He wore silk pyjamas, a red silk belt, and a wide hat of double felt. He looked cool and Marston thought he harmonized with his surroundings; the background of dazzling water, the slanted masts that caught the light as they swung, and the oily black figures of the naked crew. He wondered whether Harry had inherited something from ancestors who had known the tragedies of the middle passage. Marston himself was wet with sweat, his eyes ached, and his head felt full of blood. "We may drift about for some time," he said, throwing down a book he had tried to read. "The sailing directions indicate that the Trades are variable near their southern limit." "It's a matter of luck," Wyndham agreed, and Marston started because his comrade's next remark chimed with his thoughts. "When I studied some of the house's old records I found that two of our brigs vanished in the calm belt. One wondered how they went. Fire perhaps, or the slaves broke the hatch at night. Can't you picture their pouring out like ants and bearing down the drunken crew? The crews did drink; slaving was not a business for sober men. Hogsheads of rum figure in our old victualing bills." He paused and resumed with a hard smile: "Well, it was a devilish trade. One might speculate whether the responsibility died with the men engaged in it and vanished with the money they earned. None of the Wyndhams seem to have kept money long; luck went hard against them. When they did not squander, misfortune dogged the house." "Superstition!" Marston exclaimed. Wyndham laughed. "It's possible, but superstition's common and all men are not fools. I expect their fantastic imaginings hold a seed of truth. Perhaps somebody here and there finds the seed and makes it grow." "In Africa, they water the soil with blood. It's not a white man's gardening." Marston rejoined and went forward to the bows, but got no comfort there. The sea shone like polished steel, heaving in long folds without a wrinkle on its oily surface. But for the sluggish rise and fall, one might have imagined no wind had blown since the world was young.