“Then I think I’ll just ask them the meaning of this unwarranted chase. They haven’t any right to keep after me like this, unless they’re a government vessel, and they’re not that or they would have shown their colors long ago. That’s what I’ll do. I’ll stop!”

He turned toward the pilot house to give the order. Fenn took up the binoculars, which the captain had laid down, and looked through them at the strange steam yacht. He could make out the two men on deck, one of them—he with the sinister face—staring at the little knot of boys, who seemed, so unaccountably, to have become involved in a mystery.

Following the ringing of the engine room bells, the Modoc’s speed began to slacken. Captain Wiggs came back to where the boys were and remarked.

“Now we’ll see what will happen.”

Hardly had he spoken than there sounded from the pursuing craft, which had not slackened speed, a shrill hissing. Then a white cloud appeared to hover over her.

“She’s broken a steam pipe!” cried the captain. “Too much pressure! I thought she couldn’t stand it!”

The strange craft was almost lost to sight in the cloud of white vapor that enveloped her, while, from the midst of it, came excited cries.


CHAPTER XI