"You sit there in the middle," the captain ordered, as they reached the boat, "and keep yer head low in case the boom should take a sudden yank over. Ye won't git so wet there, either."

The wind on the homeward run was almost dead ahead, and it was necessary to beat from side to side of the channel. But the captain knew every inch of the way, and he was almost as much at home here at night as in the day. Up and up they steadily crept, while the Roaring Bess raced from side to side, tossing volumes of water at every plunge. Rod was alert and active as a cat now, crouching close to the captain, ready to obey his slightest command. How the boy did enjoy it, and his whole body thrilled with the excitement of the wild run. The more the yacht reeled, the greater his pleasure. But the doctor had far different feelings. He liked the water, but not on such a night as this. He was sure that the boat was going over every time a furious gust struck her close-hauled sail, and he always gave a sigh of relief when she righted herself again, with no more damage than some extra water tossed on board.

They were opposite the head of the island now, and had just tacked for their "short-leg" run, when, without the slightest sign of warning, something struck the mast a terrific blow. The yacht reeled wildly, the mast snapped like a pipe-stem, and fell with a splash into the water, carrying sail and all with it.

The instant the blow came Rod sprang to his feet, and as he did so a part of the rigging caught him, and swept him overboard. With a wild cry for help, he tried to grasp something, but he could find nothing upon which to place his fingers. The cold waters closed around him. He tried to swim, to keep afloat, but the oil-skin suit hindered him. He battled with the desperation of despair. It was a terrible fight he made for life there in that inky blackness, with the water surging about him, and trying to win him for its victim. It seemed that he had been struggling for a long time, and could resist no longer. His strength was going, and he had little power for any further effort.

Just at this critical moment a firm strong hand clutched him like a vise, and he knew that the captain had come to his rescue. This roused him to new hope and energy.

"Keep cool, now," the captain cried. "I've got hold of the riggin' here."

All this had happened so suddenly that for a few seconds the doctor was dazed. He could see nothing, but he knew by the cry of the boy, and the startled roar from the captain, that something was seriously wrong. Then he heard the splash as the latter went over the side. In dismay, he waited, peering through the darkness in an effort to find out what had become of his companions. It seemed like an age that he stood there until he heard the captain's voice bidding him to give a hand, and pull him in. He sprang at once to the side of the yacht, leaned far over, and stretched out his right arm. But he could touch nothing.

"Where are you?" he shouted. "I can't reach you."

"Out here," was the reply. "Try ag'in."

Leaning farther out now upon the overturned mast, he tried once more, and had the satisfaction of feeling the sudden grip of the captain's fingers as they closed upon his own. Carefully and with much difficulty, for the strain was heavy, he was able to draw the submerged man toward him.