CHAPTER XXII.
"Z.2.X."
"Z.2.X.? Well, such things are rather out of my line, but I have heard of it—yes," replied the doctor, looking more puzzled than ever. "But what do you know about it?"
"Till two days ago—nothing," replied Jack, "but now I believe that I know where there is a trainload of it."
"Good heavens, boy, you don't know what you're talking about. Why, the stuff is as valuable—as valuable as radium. Possibly it is worth more."
"Then even a small quantity would restore my father's fortune and his health?" asked Jack, persisting in his line of inquiry.
"Undoubtedly it would restore his fortune, and in my belief his health, which he is unlikely to gain otherwise."
"Then I'll do it," said Jack, speaking for himself and Tom, for the two lads had discussed the idea the night before. "Those dividends from our share of the hydroaëroplane plant will fit out an expedition, and if we fail—well, we can still sell out our interest and help dad get on his feet again."