"Will you help me, if I—er—try to fix that Dave Porter?" asked Nat. "He started it. I don't care so much about Lawrence."

"Sure I'll help you. Anything you say goes," answered Tom Shocker, readily. He thought he saw a chance of getting another dollar or two out of Nat.

The two walked behind some bushes and there talked the matter over for several minutes.

"Fargo's is the place to go to," said Shocker, presently. "I know we can trust him."

"Of course, I don't want to hurt Porter," said Nat, nervously. "I only want to scare him."

"Sure, I understand. We'll scare the wits out of him," returned Tom Shocker. "Now, let me see. I have it—we'll catch him on the bridge. His carriage is bound to come that way, to get off Goat Island."

Dave and his friends spent the best part of a quarter of an hour around the Three Sisters Islands and then returned to their carriage.

"Now we can go to the hotel and have dinner," said Dunston Porter. "And then we can take a local train back to Buffalo."

The carriage was just crossing the bridge that connects Goat Island with the city of Niagara Falls when a man stepped up and stopped the turnout. It was Tom Shocker.

"Excuse me, but I reckon this is the number, 176," he said. "Is there a young man here named David Porter?"