"A deadly saycret--I mane a close one," declared Stoodles. "I never knew how rich I was till the lad told me just now."

"Oh, pshaw!" exclaimed Captain Broadbeam, dismissing the matter with a worried motion of his hand. "Money can't count in this case. My duty is plain! I was ordered to sail for the home port as soon as the government collection was made. Doctor Barrell reported a month ago that he had finished that collection."

"H'm, just so," observed Doctor Barrell, "but, my dear sir--ha, a thought. A moment, Captain Broadbeam, just a moment."

"Thunder!" whistled Bob Vilett amazedly in his chum's ear. "What does that mean now?"

Dave shook his head in silent wonderment. Doctor Barrell had winked at them in a quizzical, encouraging way that was mightily suggestive.

To have the high-class old scientist so far forget his dignity was a most remarkable thing.

They heard Doctor Barrell stumbling about in the aft cabin where he had stored some of the curiosities he had gathered for the government.

Suddenly there was a loud bump followed by a great clash. The next minute the doctor burst into the captain's cabin holding aloft two cracked and broken specimens of starfish.

"Captain," he cried--"bad accident! The collection is incomplete. See, Captain Broadbeam, the only specimens of the Mercuria stellaticus we had, destroyed, case tipped over."

The commander of the Swallow bestowed a searching look on the speaker, but was silent. "They are to be found only at the Windjammers' Island," went on Doctor Barrell. "Oh, dear, dear! This will, I fear, necessitate a return to the island."