He floundered forward to the foot of the mast, and when he came back the spinnaker was drawing steadily and the sloop had changed her mode of progress. She no longer rolled viciously or screwed up to windward as she lifted on a sea, but swayed from side to side with a smooth and easy swing, and Frank could steer her with a touch upon the tiller. In spite of that, steering was ticklish work, for the mainboom and the spinnaker boom went up and came down until they raked the glittering brine alternately, and Frank realized that it would be singularly easy to bring one crashing over upon the other. There was no doubt that the boat was sailing very fast, and he hazarded one swift glance over his shoulder at the canoe. She was surging along astern, hove up with her forward half out of the water, and a seething mass of foam hiding the rest of her. Harry, however, glanced forward somewhat anxiously.
"That boom's lifting too much," he said. "One of us ought to sit on it. Do you feel able to steer her?"
Frank said that he believed he could manage it.
"Well," said Harry, "if you jibe either sail across you'll either pitch me in or break my leg, even if you don't roll the boat over. Sing out the moment you feel her getting too hard upon the helm."
Scrambling forward, he crawled out along the spinnaker boom, to which he clung precariously, lifted up high one moment and the next swung down until his feet were just above the foam. Sometimes they splashed in, and Frank, bracing himself until every nerve was strung up, felt horribly uneasy. In spite of that, the wild rush through the glittering water which boiled about the boat was wonderfully exhilarating. She seemed a mass of straining sail which swayed in the moonlight above an insignificant strip of hull half buried in snowy foam. Over her black mainsail peak dim wisps of clouds went streaming by, and from all around there was a tumult of stirring sound—the clamor at the bows, the swish of water as the canoe came charging up to her, and the splash of tumbling seas. Everything ahead, however, was hidden by the sail, and he was wondering where the other boat was when Harry called to him.
"Slack the guy a foot or two and let her come up a little. Don't let it get the run of you or you'll pitch me in."
Frank was very cautious as he eased the rope out around a cleat, after which, when the spinnaker boom had drawn forward, he found that he could luff the boat. When she had swerved from her course a trifle he could see the other boat close ahead, and it gave him some idea how fast both craft were traveling. She seemed nothing but sail. Indeed, except for the torn-up track of foam that marked her passage, she looked much less like a boat than some wonderful phantom thing flying at an astonishing speed across the sea. Swiftly as she sped, however, there was no doubt that the sloop was creeping up on her, and Frank felt himself quivering all through as the distance between them lessened yard by yard. Then suddenly the contour of her canvas changed and she swung around from leeward across the sloop's bows. Frank's heart gave a sudden leap as he wondered what he must do and his nerve almost deserted him, until Harry called again.
"More guy!" he sang out. "They're trying to luff us. We must keep their weather."
Although fearful that it might overpower him, Frank slacked the guy out inch by inch, and as the sloop came up a little farther he saw the whole of the other boat again. The sloop's bowsprit was level with her quarter. She was scarcely a dozen yards away, leaping, plunging, swaying through a flung-up mass of foam, but they were steadily drawing up with her, and the boy could have shouted in the fierce excitement of the moment. Two or three minutes later they were clear ahead. He could no longer see the other boat, and he dared not risk a glance back at her. Indeed, it was a relief to him when Harry came scrambling aft.
"We'll get that guy in again," he said. "Unless something gives out, those folks won't catch us up."