“Yes, the young fellow, who the others called Noddy, a rough sort of a chap, and a slick-looking man.”

“Bill Berry and Dr. Belgrade, all right,” commented Ned.

“Did you hear them say where they were going?” asked Jerry.

“No, they didn’t talk much. Just a few words. They seemed to know how to work the machinery, and I never had a suspicion that anything was wrong. I did ask ’em where they expected to meet you boys, and Noddy said somewhere outside of Denver.”

“I guess that part was the only true thing he said,” remarked Jerry grimly. “And when we do meet him, outside of Denver, or anywhere else, well——”

He did not finish, but there was a stern look on his face.

“Which way did they head, as they started off?” asked Ned, seeking for possible clews.

“I couldn’t say,” replied Boise. “I watched ’em until they got high in the air, and then they got beyond my sight. I haven’t very good eyes, so I couldn’t say where they did head for.”

“Did they take any provisions along?” Bob wanted to know, and this time his chums did not laugh at him, for they realized the wisdom of his question.

“None that I saw,” replied the watchman. “And there were none in the airship.”