From his cot Innis reached into the pocket on the inner side of the door, and hauled out an envelope. This he handed to Dick. "What's this? Where did this come from?" asked the latter, as he pulled out several blank sheets of legal paper. "This is a funny trick. Our road map has been transformed into nothing." "Maybe I got hold of the wrong envelope," suggested Innis. "Here's another," and he pulled out a second. "No, those are the legal papers," said Dick, after an examination. "See if the map isn't there." It was not, and a search of the other places in the auto where it might have been put did not reveal it. "This is queer," exclaimed Dick. "Our road map disappears, and we have some blank papers in its place." "But the legal papers are safe!" exclaimed Paul. "What do you mean?" "I mean that there's been some crooked work here. Some one tried to get those legal papers, and took the road map by mistake." CHAPTER XVI THE LAME MAN For a moment Dick stared at his chum uncomprehendingly. Then a light came over his face, and he said: "By Jove, old man! I believe you're right." "I'm sure of it," declared Paul. Innis looked at the two in some bewilderment. "I wish you'd kindly explain," he said. "I may be bright looking, but I guess I'm an awful dunce when it comes to making a stab at what you two are getting at. The road map is gone--I get as far as that--and the legal papers are safe. But how do you decide that a change has been made?" "Easy," answered Paul, showing a bundle of the kind of paper known as "legal cap," with red lines down the side. "These were in the envelope containing the road map. The map and the legal documents were in the same pocket on the auto door. I remember, for I looked at the map to see how many miles we had made after we crossed that river." "Maybe it dropped out on the road," suggested Innis. "Mind you!" he said, quickly, "I'm not saying this to be stubborn, but I want to make sure that we're not overlooking anything. For if it's true, what Paul says, it means that there's something wrong going on, and that we've got to be on our guard." "I believe you," asserted Dick, "and I'm just as glad to have you raise all the objections you can. We want to be very sure of what we're about. Now it's pretty well settled that none of us have had the road map since it was put in the flap pocket last night. The envelope of legal papers looks just like the road map, and any one putting their hand in after dark, might get one in place of the other." "And, lucky for you he got the wrong envelope," said Innis. "It's a good joke on whoever it is." "Yes," agreed Dick, "and I'm beginning to have an idea of who it is." "Who?" demanded his two chums. "My Uncle Ezra, of course. Who else would have an object in preventing me from trying to save Mr. Wardell's fortune?"