"Exactly. We'll try to give these villains the slip, and we'll need all our strength and wits to do it. We'll wait until night, and see what we can do."
"But where will we escape to?" asked Mr. Swift. "The island will afford no shelter, and—"
"No, but our submarine will," went on the sailor.
"It's in the possession of the Brazilians," objected Tom.
"Once I get aboard the Advance twenty of those brown-skinned villains won't keep me prisoner," declared Captain Weston fiercely. "If we can only slip away from here, get into the small boat, or even swim to the submarine, I'll make those chaps on board her think a hurricane has broken loose."
"Yes, and I'll help," said Mr. Damon.
"And I," added Tom and the balloonist.
"That's the way to talk," commented the captain. "Now let's eat, for I see that rascally lieutenant coming this way, and we mustn't appear to be plotting, or he'll be suspicious."
The day passed slowly, and though the prisoners seemed to be allowed considerable liberty, they soon found that it was only apparent. Once Tom walked some distance from that portion of the deck where he and the others had been told to remain. A sailor with a gun at once ordered him back. Nor could they approach the rails without being directed, harshly enough at times, to move back amidships.
As night approached the gold-seekers were on the alert for any chance that might offer to slip away, or even attack their guard, but the number of Brazilians around them was doubled in the evening, and after supper, which was served to them on deck by the light of swinging lanterns, they were taken below and locked in a stuffy cabin. They looked helplessly at each other.