caught a deep breath as he was drawn under, however, and this
stood him in good stead. Calmly the lad reached for the large
pocketknife he always carried, and with this, under water as he was,
proceeded quietly to cut the sides of the craft sufficiently to allow
him to escape. And in this he was successful.

At last he was free and struck upward as swiftly as possible. When it
seemed that his lungs must burst for want of air, his head suddenly
bobbed upon the surface. He gasped as he inhaled great breaths of the
fresh air. A boat approached at that moment and he was drawn aboard,
where he sank down.

Jack, when he came up from below, had thought first of Frank. Rapidly
he scanned the surface of the sea for some sign of his chum or of the
wreckage. Seeing neither, he knew what had happened. Taking a deep
breath he dived.

It took the lad some time to locate the sinking mass of wreckage below
and when he did come upon it there was no sign of Frank. Jack stayed
below until he could stand it no more; then rose to the surface. There
rough hands seized him and dragged him into a boat.

In vain the lad struggled. He wanted to get loose so he could make
another attempt to rescue his friend.

"Frank!" he cried.

"Be still," said a voice kindly. "Frank is safe in the next boat."

Jack uttered an exclamation of relief and lay still, resting from his
exertions.

And so they came again to the _Queen Mary_ and were lifted aboard.
Frank and Jack clasped hands when they stood on deck and Jack
exclaimed:

"By Jove! I thought it was all over when I couldn't find you down
there."

"I thought it was all over myself for a minute," said Frank. "That's
one time when this old knife of mine helped out. I brought it back with
me."

He displayed the knife and patted it affectionately.

"How do you feel?" asked Jack.

"First rate. And you?"

"Fine. Now we want to see Captain Raleigh."

At this moment the third officer approached.

"Captain Raleigh will receive you the moment you have put on some dry
clothes," said the third officer.

"But we must see him at once," exclaimed Frank.

"Change your clothes first," said the third officer kindly.

"But----" Frank began.

"I have Captain Raleigh's orders for you to report to him the moment
you have changed," said the third officer sharply. "You will hurry, if
you please."

Frank could see that there was no use protesting further. He shrugged
his shoulders and the two boys m