There was nothing to be seen.
Then he swept the sea to the left, and, less than a quarter of a mile away, the Austrian submarine was bearing down on them.
Lord Hastings, who had followed the searchlight with the torpedo, immediately launched it, and then, springing outside, gave the command to rise.
The D-16 leaped to the surface like a thing of life.
Lord Hastings took Jack’s place at the periscope.
“Guess we got him that time,” he said.
“Hope so,” replied Jack briefly.
“I don’t see,” began Lord Hastings, “how—down quick!”
The submarine dropped like a log, and Jack exclaimed:
“What’s the matter?”