rt?" Andy wanted to know. "Is his arm broken?"

"No, only severely sprained. In addition, he has several big bruises
and a number of cuts where he must have been tossed against the rocks.
His hands are burned slightly, but there is nothing dangerous, and with
care he ought soon to recover."

"He must have gotten burned trying to put out the fire on the boat,"
commented Frank. "But, Dr. Martin, did you learn anything about him?
What's his name? Where does he belong? What was he doing near the
Shark's Teeth in a gale?"

"I can't answer any of your questions," replied the physician gravely.
"I asked the lad who he was, thinking that his people would be worried,
and that I might be able to send some word to them. But, though he was
fully in his senses, and seemed to realize what he had gone through, I
couldn't get a word out of him about his name.

"When I asked him, as I did several times, and as also did your mother,
he would begin, 'I am----' Then he would stop, pass his hand across
his forehead, and look puzzled. He did this a number of times, and it
seemed to pain him to try to think. So I gave it up."

"How do you account for that?" asked Andy.

"Well, the fright and injuries he received may have caused a temporary
loss of memory," replied the doctor. "Or there may be some injury to
the brain. I can't decide yet. But I'll look in again this evening.
He'll be much improved by then, I am sure."

"It's getting queerer and more queer," commented Andy, as the physician
hastened away in his car. "Think of forgetting who you are, Frank!"

"It sure is too bad. We must try to help him. That motor boat would
be a clue, I think. As soon as the weather gets better, and this storm
blows over, we'll have a search for it."

"Yes, we're in for a hard blow, I think. It's a worse gale now than
when we were out."

The wind, which had momentarily died out, had sprung up again with the
approach of night, and it began to rain. Out on the bay, a view of
which could be had from their house, the boys could see big tumbling
billows.

"It's a good night to be home," mused Frank. "I'm afraid we'll never
see that wrecked motor boat again. It will pound to pieces on the
Shark's Teeth."

"Very likely. Well, let's go in and see how much nearer supper is
ready. Dad's home now."

It was rather a long and dreary night, with the storm howling outside,
and Frank, who had the last watch, was not sorry when the gray da