"Thank heaven you've come!" exclaimed the captain, whose haggard countenance showed all that he had been through. "We're just about at our last ditch. The animals we were taking from Jamrachs, in Hamburg, for an American circus, broke loose after the collision with the derelict. They've killed two of my men and maimed another."

"All right, my hearties, just hold on a minute and we'll have you out of that," exclaimed Mr. Billings cheerfully.

More roars and screeches from the loosened animals checked him. Then came more shots, telling of an attack on the stern, the only cool part of the ship left, which had been repulsed. The flames shot up, seeming to reach to the sky, and the smoke blotted out the sun, enveloping everything in the burning ship's vicinity in a sort of twilight.

"Do you think we'll be able to get all of them off?" asked Jack eagerly.

"I'm in hopes that we will," said Mr. Billings, "if nothing untoward happens."

There was, Jack noticed, a shade of anxiety in the young officer's tone. There was, then, some peril, of which he knew nothing as yet, attached to the enterprise, thought Jack. But of the nature of the danger he had no guess till later.

As the first boat, Mr. Billings' craft, drew alongside the blistering side of the burning ship, a Jacob's ladder came snaking down from the stern. At almost the same moment Jack, who had been looking upward, uttered a shout of alarm.

The fierce face of a wild beast had suddenly appeared above the rail of the blazing Oriana. The next instant a great lithe, striped body streaked through the air straight for the boat. Instinctively Jack, who saw the huge form of the tiger, for that was the desperate flame-maddened creature that had made the jump, sprang for the side of the boat and dived overboard.