“On the contrary, it is safe, and you and I will be the only ones knowing where it is.”

“I am all anxiety.”

“It is here in my pocket.”

“You certainly surprise me. What prompted this move on your part?”

“I felt that someone was after the chart, and I thought of a way to mislead them.”

“Go on. I am all interest.”

“I made a copy of your chart and substituted it for the original, then I put the copy in the hiding place.”

“And the copy was stolen?” the professor inquired ruefully. “What about that? Won’t it disclose our secret?”

“The copy, if you may call it such, that I made,” laughed Jim, “had the descriptions and instructions altered so that it will be misleading rather than helpful.”

“Good!” said the professor. “You are an assistant after my own heart. Our chances of searching undisturbed are greatly improved.”