only hope we are rid of him for good,” he said, fervently.
“There seems to be no doubt of that,” declared Hiram, with a satisfied smile. “Say, though, I wonder why he was sneaking around the hangar here?”
“To pick up what information he could about our plans, to disturb them if he could, I suppose,” said Elmer.
Just then Dave appeared. His friends noticed that he was somewhat thoughtful. No one alluded to the visit of the girl whom the young aviator had just escorted to the automobile. Dave did not seem to have any explanations to make. The others told him about the discovery of Vernon and his summary disappearance. Then the incident was dismissed from their minds as they all went over to the restaurant at the other end of the big aviation grounds for supper.
Dave told his young assistants that he had an engagement in the city the next morning. There were some little purchases to make for the Comet, and he took Hiram along with him.
“I am going to call upon the friends of the young lady you saw last evening, Hiram,” he confided to his friend. “They live at the Hampton Flats,” and he gave Hiram the location. “If you like, after you get through with your shopping you can call there for me. Then we can go back to the park together.”
“All right,” assented Hiram, “I shan’t be busy for more than an hour.”
It was about eleven o’clock when Hiram started for the Hampton Flats. He finally turned into the street where the building was located. As he neared it, a man came hurriedly down its steps, passed down the street, and disappeared from view around the corner.
“Well, I’ll be bumped!” exclaimed Hiram, forcibly.
He came to a dead stop, irresolute as to the course he ought to pursue. Hiram had recognized the man as Vernon. He wondered how the rascal came to be in the building where his airman friend was.
“Why, he’s nagging Dave, that’s sure,” declared Hiram. “But why? It won’t do any good to run after him. I must tell Dave about it, though, and – there he is now.”
The young aviator appeared at just that moment. He looked up and down the street and then advanced towards Hiram as he made him out. The latter fancied he had never seen Dave look so grave and thoughtful, but our hero roused up into instant interest as Hiram said:
“I saw Vernon come out of that building just before you did.”
“What’s that!” challenged Dave. “Out of that building?”
“Yes, he did, Dave. Now what do you suppose he was doing there?”
The young airman did not reply. He walked along in silence. Hiram saw that he was a good deal stirred up, but all Dave said about the incident was:
“I’m glad you discovered this, Hiram, and told me about it. We want to look out for that fellow.”
All that day, Hiram noticed that the pilot of the Comet seemed to be preoccupied. The hum and bustle of the approaching event, however, took up the attention of all hands. They had a busy day of it, and Hiram was so tired out by nightfall that he had well-nigh forgotten all about the unexplained incident of the earlier hours of the day.
Just after daylight the next morning Elmer stirred on his sleeping cot and drowsily cried out:
“What’s up? I thought I heard some one call for Dave.”
“You did,” replied Hiram, jumping from under the bedclothes. “I just roused up to see one of the hangar men scurrying out of here, and Dave, half dressed, rushing after him. Hurry up, get your clothes on.”
“What for?” inquired Elmer, sitting up in his cot and rubbing his eyes sleepily.
“Because I caught a remark the hangar man made.”
“What was it?”
“‘Something wrong with the Comet!’”
CHAPTER VI
THE STOLEN BIPLANE
The alarming words spoken by Hiram were sufficient to at once bring Elmer out of bed and onto his feet. Speedy as Elmer was, however, Hiram was outside, shoeless and hatless, almost before his drowsy companion had drawn on his sweater.
“What’s the trouble?” panted Elmer, trailing after his companion a minute later.
His eyes grew big with wonder and suspense as he noticed Dave and the hangar man running around to the rear of the portable biplane shelter. In front he saw Hiram posed like a statue and staring hard.
“The Comet is gone!” announced Hiram. “Look there – gone!”
He spoke in a tone of voice as if the whole world was slipping away from them. Elmer, gaining his side, saw that the hangar was empty.
“Oh, say!” he gasped, “you don’t mean to say – ”
“Stolen? Yes! That is sure,” came in Dave’s tones, and the young aviator hurried around to the spot.
“You see, whoever took it drew the steel frames and canvas out of the whole back,” the hangar man was explaining. “The wheel marks yonder run about twenty feet. Whoever did it knew his business. There was no wasted fooling around – up and away was the programme.”
Dave stood silent, thinking hard. Elmer came up to him, worried and anxious. By this time Hiram had got full steam of excitement on.
“See here, Dave,” he cried, “what is this – a trick, or something serious?”
“It’s pretty serious,” answered the young airman. “Whoever ran away with the Comet had a bad motive in view – I feel certain of that.”
“You mean, to keep us from making the start in the race?” inquired Elmer, anxiously.
“Just that,” assented Dave, positively. “No ordinary thief would steal the biplane, for he couldn’t sell it. Professionals do not meddle with other people’s machines. I’ve got a lot of suspicions about this mysterious piece of business, but there’s no time to lose in theorizing.”
“No, we must get on the track of the Comet right away,” declared Hiram, adding, “but how?”
Dave gave a few rapid, undertoned directions to the hangar man. Then he hurried back to the living tent, followed by his friends, and all completed dressing. Then, Dave piloting the way, they made a brisk run for the office building of the club in control of the meet.
The young airman was lucky in running across the manager, a man who knew his business thoroughly. Inside of an hour, with his perfect knowledge of details, he had telegraphed every aviator and practice station in the East to be on the watch for the stolen machine. Dave was leaving the office building when they met Mr. Brackett.
“Oh, father!” exclaimed his son, in distress, “the Comet has been stolen!”
The aeroplane manufacturer was stunned by the announcement. Dave motioned him instantly to one side. Hiram’s heart took hope as he noted the business-like look on Dave’s face.
“He’s got some plan worked out already,” announced Hiram to Elmer. “Dave isn’t telling us all he has guessed out.”
Whatever information the young airman was imparting to Mr. Brackett, the latter seemed greatly interested, and his troubled face cleared somewhat as Dave proceeded. Soon the manufacturer hurried away. Dave consulted his watch and came briskly up to his young fellow aviators.
“There’s just time to get our breakfast,” he announced.
The boys had about completed the meal, when an automobile drove up in front of the restaurant and the aeroplane manufacturer got out. Dave hurried to his side. There was a brief consultation, and our hero beckoned to his friends.
“You had better come with me, Hiram,” said the young aviator; “I shall need you. If you will keep track of things around the hangar, Elmer, it will help out.”
Dave waved his hand