“Exactly,” said Lord Hastings.

“Well, let’s dive then,” said Frank.

“The sooner the better it will suit me,” said Jack.

“So be it then,” from Lord Hastings. “You may give the order, Mr. Templeton.”

Jack obeyed, and slowly, as the water was let into her tanks, the D-16 sank and sank, until, certain that she was beneath the enemy’s mines, Lord Hastings gave the command: “Full speed ahead!”

CHAPTER V.
TROUBLE ON BOARD.

“It’s as well to go quickly,” Lord Hastings said, giving his reason for ordering full speed ahead. “I hardly anticipate they have mined very deep here. We’ll slow down further along.”

“If we bump a mine,” said Frank, “I can’t see that it will make any difference whether we are going fast or slowly.”

“It won’t make much,” agreed Jack dryly.

According to Lord Hastings’ calculations, which proved to be correct, they were now off the coast of Holland.