If Mr. Costigan appeared astonished, Tom Halstead did not look less so. That he was really to command this big, handsome craft seemed to Tom like a dream. A moment before, when he had realized that the "Panther" was Mr. Baldwin's craft, the most the Maine boy had expected was that he and his companions would be allowed to stand watch in the engine room and on the bridge. But—captain!

Third Officer Costigan, however, saluted in a most proper manner. Tom held out his hand cordially.

"Presently, Mr. Costigan, I shall ask you to show me about this craft."

"At your orders, sir," replied Costigan, again saluting his commanding officer, then making his way forward.

"Here's the captain's cabin. I have the key," announced Mr. Baldwin, leading the way to a door immediately aft of the pilot house. The owner unlocked the door, then led the way inside. Again Captain Tom wondered if he could be dreaming. Though everything was compact in this stateroom, yet all the conveniences were there, too. There was a double bed, a wardrobe locker, running water, two easy chairs, a desk, and a table just under a well-stocked China and glass cupboard.

"Your stateroom runs right through the deck-house from starboard to port," explained Mr. Baldwin, who now appeared less pressed for time. "Bathroom and chart-room open out of this cabin aft. I think, Captain, you will be comfortable."

"Comfortable!" murmured Tom, then smiled in sheer delight.

The other motor boat boys stood about the doorway, not offering to enter while the owner was there. Mr. Baldwin dropped into one of the arm chairs.

"Now, Captain, I'll tell you what we have aboard," continued the owner. "Costigan is third officer. He's a good fellow, and a capable sailor, but he has his limitations, and—well, I don't believe he'll ever be much more than a third officer. You'd better keep him in that grade—unless you find he's better than some of your comrades. One good thing about Costigan is that he has a pilot's license for San Francisco Bay and the coast hereabouts. He's a good pilot, too. Another good thing about Costigan is that he's loyal, and a man who knows how to keep his tongue resting in the back of his mouth.