"Send Mr. Legrand to me, and——" he broke off. "But how do you know?" he asked suspiciously.

"It is not a case of knowledge. It is a case for preparation," he said. "If we have the arms distributed——"

I was interrupted by a sharp report from below. Day ran out in his pyjamas, and I followed. We heard Barraclough's voice from the bridge, raised angrily.

"Go back there, man; get back, Gray."

It was a pitch black night, save for the glittering stars, and I could only make out a knot of men at the head of the ladder leading from the lower deck.

"What the devil do you mean?" shouted Barraclough; and then all of a sudden the knot of men opened in a struggle, and a man burst through and dashed towards us, falling at my feet.

"For God's sake, sir," he panted out. "They've seized the engine-room, and Mr. McCrae's shot. 'Twas Pierce done it."

I recognised by his voice Grant, one of the deck-hands, and I helped him to his feet.

"Who's in this?" I asked; but before he could reply the gang of men approached nearer, and some one spoke from their midst. It was Holgate.

"Captain Day, I regret to state that the men are not satisfied with the way things are being conducted," he said, in a level voice. "They are not satisfied with their pay, for one thing, and there are other matters. No harm is intended, but they have decided that I am to take your place, and for the present you are to consider yourselves prisoners—particularly the doctor," he added.