“As a trivet,” pronounced Hiram. “Been a slow wait; eh?”

“Oh, I snoozed a little,” replied Elmer; “lunched some, and had a hard time explaining my being here to a suspicious old watchman who looks after the grounds.”

“Get aboard,” directed Dave, and Elmer sank into the seat with a contented sigh.

“It’s business now, I suppose,” he remarked. “Say, fellows, it’s a big thing we hope to do; isn’t it?”

“Yes,” assented the sprightly Hiram; “and I reckon we’ll have seen some startling sights before we come this way again.”

CHAPTER IV

A MYSTERIOUS VISITOR

Dave Dashaway stood at the entrance to the hangar of the Comet at Sylvan Park. The machine had done nobly on the trial field near the Capitol city. Now it was housed among the group of competitors in the great race. The pick of the world’s best airmen was represented at this international meet, and the scene was one of activity and interest.

The airship boys were comfortably housed in the living tent just beyond the hangar. At first upon arriving it had been decided to have Elmer stay away from the field until the final start was made. This procedure was actuated by the fear that the troublesome Vernon might put in an appearance and continue to annoy and hamper the young airman. The next morning, however, Mr. Brackett arrived.

“I am here for two reasons,” he had announced. “First, I wish to see our last word in biplanes, the Comet, sail off on the race I know you are going to win. Next, I want to be on hand if that troublesome Vernon tries any more of his tricks.”