Rob looked after him with a smile on his face. He turned to Andy and laughed.

“Isn’t he the greatest crank in his line you ever saw?” asked Andy.

“Oh! it’s hardly fair to call Hiram that,” expostulated the scout leader; “he’s enthusiastic over inventions, but what of that? Every fellow who’s dead in earnest could be spoken of as a crank. And it’s the cranks, as you call them, who make the wheels of progress go around.”

“Yes,” added Andy dryly, “I’ve noticed that some of them even seem to have wheels in their heads, though they get hopping mad if you mention it, or turn your hand this way,” and he indicated a revolving motion with his finger that could hardly be mistaken by a sensitive person.

“All I know is that Hiram is due to enjoy the greatest feast his soul ever could imagine. But don’t let us waste any more time here, Andy; I’ve got my bearings by now, and can take you straight to the building where the scientists love to gather and gloat over the queer things that are so wonderful to them. Come along!”

CHAPTER XI.
ROB DELIVERS THE GOODS.

“What’s that splendid looking arch over there meant to represent, Rob?” asked Andy, as he pointed to the right.

“They call it the Arch of the Setting Sun,” replied the scout leader.

“They call it the Arch of the Setting Sun,” replied the scout leader.