“Why? Do you think they are thieves?” asked Bart.

“There’s no telling what they are,” and the captain took another observation at the steamer in the rear. “You know the lakes are part of the dividing line between the United States and Canada. Often criminals from both countries find it to their advantage to conduct some of their operations on the water, and there are any number of questionable characters plying on this lake. I can’t make out why those men should want you boys, or Fenn, more particularly, unless they think he may know something of their operations, and they want to stop him from talking.”

“Well, they can’t prevent me!” boasted Fenn.

“Don’t be too sure,” cautioned the captain. “Of course you have nothing to fear as long as you are with me, aboard the Modoc, but don’t run any chances while ashore. Meanwhile those fellows have got to catch us first. They’ve got nerve, I must say, pursuing us as if they were government officers and we were smugglers.”

“Do smugglers cross the lake?” asked Ned.

“They try to, and, sometimes they succeed. But I wish you boys would go down to dinner. I want to keep watch of this boat. When you finish, come up on deck, and you can stand guard, while I eat. We’ll keep tabs on her then, and we needn’t let any of the crew here know about it. It’s just as well to keep matters a little quiet until we find out what it all means.”

The boys did not linger long over their dinner, and were soon on deck again. They found Captain Wiggs gazing at the pursuing steam yacht through the glass.

“She’s coming on,” he said. “Seems to have plenty of speed, but I guess we can show her a little ourselves. I’ll give orders to the engineer to increase our rate some. Then we’ll see what happens. You keep watch, and let me know when I come back.”

He handed the binoculars to Fenn, and went below. The four chums took turns looking at the on-coming craft. Presently they noticed that their own steamer was making faster progress through the water.

“I guess we’ll leave ’em behind now,” observed Frank.