Jack thought of these things as he buttoned himself into his oil-skins, secured the flaps of his sou’wester under his chin and once more fought his way forward along that dancing, swaying bridge, below which the water swirled and swayed like myriads of storm-racked rapids.

The captain, grim as ever, was still on the bridge, but now Jack saw that both he and the officer who shared his vigil were eying the seas through the glasses. They appeared to be scanning the tumbling ranges of water-mountains in search of some object. What, Jack did not know. But their attention appeared to be fully engrossed as they handed the glasses from one to another, holding on to the rail with their free hands to keep their balance.

Presently the chief officer shook his head and shrugged his shoulders as if he had negatived some proposition of the captain’s.

The latter replaced the glasses in their box by the engine room telegraph, and Jack, deeming this a favorable opportunity, came forward with his report.

He had almost to scream it into the captain’s ear. But the great man heard and nodded gravely. Then he turned away and drew out the glasses once more and went back to scanning the heaving seas.

Jack, from the shelter of the wheel-house, within which an imperturbable quartermaster gripped the spokes of the wheel, followed the direction of the skipper’s gaze.

All at once, as the Ajax rose on the summit of a huge comber, he made out something that made his heart give a big jump.

It was a black patch that suddenly projected itself into view for an instant, and then rushed from sight as if it would never come up again.


CHAPTER VIII.