When they began to row Marston's boat was drawn back under the yacht's iron martingale. Her bowsprit loomed above it, threatening and big, and the oars bent as the Kroos drove the boat ahead. In a few moments she stopped and forged back towards the yacht, but the jerk was less violent. _Columbine_ was moving faster and the heavy warp worked like a spring, easing the shock. Marston's business, however, was to tow her round and when she began to turn he had trouble to keep his boat in line. The tightening rope rasped across her stern, the gig swerved and listed over, until it looked as if she would capsize. The oars on one side were buried deep, the men could not clear them for another stroke, and the threatening martingale rose and fell close astern. Marston, when the rope would let him, sculled with a long oar, and presently the skin peeled from his hands. His throat got parched, sweat ran down his face and he gasped with straining breath, but it was better to use his strength than risk the martingale's being driven into his back. They pulled her round and it was easier afterwards although he could not relax much. The yacht was stealing through the water, but they must keep up her speed or the violent jerks would begin again. It was only possible to rest for a moment on the crest of the swell when the warp absorbed the backward pull. A negro began to sing and the rest took up the chorus. The air was strange and dreary but somehow musical, and Marston imagined it was very old. He understood the Kroos had sung their paddling chanties long before the Elizabethan slavers touched the fever-coast. The night was very calm and dark. The figures of the men were indistinct, but when the song stopped Marston heard their labored breathing and the regular splash of oars. They rowed well and he hoped their toil was not wasted. By daybreak they might reach the edge of the wind, but the fickle zephyrs might die away and the fiery dawn break across another glassy calm. When he was not sculling Marston mused. He was rich and owned it strange that he was there, laboring in the boat, as the slavers labored when they towed the _Providence_, two hundred years ago. He wondered why men went to sea in sailing ships, to bear fatigues nobody endured at home, to fight for life on slanted yards, and stagger waist-deep about flooded decks. Yet one went, and sometimes went for no reward. The thing was puzzling.