and went as the billows rolled onward, and which could be only the dreaded periscope of the waiting submarine pirate.
Then again loud cries were heard. This time they carried an even more terrible menace. It was bad enough to be told that a periscope had been sighted off the weather bow, but when many quivering fingers pointed to the near-by water, and the import of the fresh alarm could be understood, the sudden dread caused every heart, for the moment, to cease beating.
"A torpedo coming!"
"Look! You can see the bubbles swinging out on either side as it heads this way!"
"Everybody get his life-preserver on!" shouted an officer, running along the promenade deck and swinging his arms violently to attract attention.
"Gee, Tom, this looks bad!" gasped Jack.
"So it does, Jack," was the brief reply.
