The Master Key

Rob yawned, for he thought the Demon's speeches were growing rather tiresome. Perhaps the genius noticed this rudeness, for he continued:

"I regret, of course, that you are a boy instead of a grown man, for it will appear singular to your friends that so thoughtless a youth should seemingly have mastered the secrets that have baffled your most learned scientists. But that can not be helped, and presently you will become, through my aid, the most powerful and wonderful personage in all the world."

"Thank you," said Rob, meekly. "It'll be no end of fun."

"Fun!" echoed the Demon, scornfully. "But never mind; I must use the material Fate has provided for me, and make the best of it."

"What will you give me first?" asked the boy, eagerly.

"That requires some thought," returned the Demon, and paused for several moments, while Rob feasted his eyes