Mart sent a blank gaze at his chum, as Jerry replaced his pipe in his mouth and gazed calmly out at the ocean. This cool reception of his bomb was dismaying to say the least; but Bob came promptly to the rescue, and more successfully.

"Why do they call you Shark Smith, Jerry?" he asked carelessly.

This time the boys scored visibly. The quartermaster's position did not change, but his bleared eyes suddenly flashed out quick and keen and bright, while his wrinkled old face lost its gently benignant expression as his firm mouth snapped shut on his pipe. This was not the first time the boys had seen that swift alteration of his features; and now it passed as quickly as it had passed before. Jerry turned slowly and looked at them, a slow smile crinkling up his eyes.

"Why, lads, ye main surprised me, ye did that! How come you to learn that old Jerry was called Shark Smith, now?"

"Oh, we heard about it," laughed Mart carelessly. "What's the reason, Jerry?"

The quartermaster chuckled again, tapped down his pipe, and replied frankly.

"Well, lads, I like both o' you, so I'll tell you. You mind me tellin' you about that there Pirate Shark, one day?"

They answered his questioning look with a nod.

"Well, when we was in the old Coralie, tradin' among the islands and doin' a bit o' pearl-fishin' on the side, we met up wi' that there Pirate Shark. He nipped two of our men, he did, and I been chasing him ever since, lads. I'm goin' to get him, an' I'm goin' to lay him out where he won't kill no more men, lads. My mates know this and that's why they call me Shark Smith, 'cause why I've been after that there Pirate Shark for a long time. Now I'm goin' to get him this cruise."

Mart's eyes flashed suddenly. He thought he understood everything now.