“How about over there?” asked Jerry, indicating a spot to the left.
“All right,” assented Ned. “See any more smoke?”
Jerry resumed his observations, but shook his head to indicate that he saw nothing. They were soon near enough to see by the use of their unaided eyes, but the nearer they came the more it became plain to them that the camp was deserted.
“And now to see what it all means, and what happened to the engine!” exclaimed Ned, as he made the landing neatly and leaped out, followed by Bob and Jerry.
“Hello! Anybody here?” yelled Jerry as he looked about near the place where the shelter tent had stood. There was no reply save the echo of his own voice.
“Well, it couldn’t have been the professor, or he’d have been so glad to see us that he’d be jumping about here now,” commented Bob.
“But where is the fire that made the puffs of smoke?” asked Ned.
“I think there wasn’t any fire,” said Jerry.
“No fire? What do you mean? Didn’t I see smoke?”