"Then let's get a move on!" cried Tom with enthusiasm. "Do you think this man will come with us, Mr. Petrofsky, to help in the rescue, and show us the place?"
"He says he will," translated the exile, "though he is much afraid of our strange craft. Still he knows that to trust himself to it is better than being captured, and sent back to the mines to starve to death!"
"Good!" cried Tom. "And if he wants to, and all goes well, we'll take him out of Russia with us. Now get busy, Ned, and we'll have this machine in shape again soon."
While Ivan Petrofsky took his new friend inside, and explained to him about the workings of the Falcon, Tom and Ned labored over the gas machine with such good effect that by night it was capable of being used. Then they went aloft, and making a change in their route, as suggested by Mr. Borious, they headed for the desolate sulphur region.
For several days they sailed on, and gradually a plan of rescue was worked out. According to the information of the newcomer, the best way to save Mr. Petrofsky's brother was to make the attempt when the prisoners were marched back from the mines to the barracks where they were confined.
