“Is everything all right?” asked Ned, who led one of the four parties. He glided to his chum’s side from the darkness.

“Everything is settled, and we get three million dollars for a half interest,” said Tom, producing the agreement.

“Hot dog!” gleefully cried Ned. “That’s the best news yet! We sure will need that money, Tom! I couldn’t have held the banks off much longer. Good for you!”

In a short time Tom and Ned, with Mr. Damon, Koku and Eradicate were on their way back across Lake Carlopa, leaving the other members of the Swift party to follow in other boats as they pleased.

Though Tom Swift had gone to Rattlesnake Island alone as he had been bidden, the setting of his trap called for many of his most trusted men to precede him to the rendezvous. They had gone at intervals so no suspicions would be aroused.

So, during the day before the night of the meeting, several parties of seemingly innocent fishermen might have been seen landing on the island at a point farthest removed from the dock used by Tom. These parties were posted in the woods on four sides of the frame house and there they waited for Tom’s signal. Ned was in charge of one party and Mr. Damon of another. Garret Jackson and his assistant took command of the two remaining squads.

“And bless my fountain pen!” exclaimed Mr. Damon as they were talking matters over on their way home in Tom’s boat, “I thought you were never going to flash the signals, Tom.”

“It took a little time to get things where I wanted them,” the young inventor said. “But it worked out all right. They certainly were astonished.”

“Do you think they’ll play square with you, Tom?” asked Ned.

“They’ll have to, for their own safety. I’ve got them where they can’t help themselves. After the final demonstration, a week from to-night, we get the three millions.”