landing gear. âBut I canât understand why. A cotter pin holds the collar tight and that keeps the wheel on the axle. I checked the plane this morning. There wasnât anything wrong with that wheel!â
Frank, Joe, and Cap looked at one another, the same question in each oneâs mind. Had someone tampered with the plane because of them?
âJack, would it be hard for a person to loosen one of these wheels?â Frank asked.
âAny good mechanic would know how,â the pilot answered. âWhy?â
Frank told him of the attack on Cap. It was entirely possible that someone had taken this method of trying to stop the trio from making the trip.
A determined gleam came into Jack Wayneâs eyes. âIâll get another plane. Iâm sure that the airport manager will let me borrow his. We shanât be delayed more than fifteen minutes.â
Upon hearing of their plight, the manager readily offered the use of his private plane. The travelers transferred their equipment at once.
This time the plane rolled smoothly down the runway, rose, and headed for Green Sand Lake.
The Hardys admired the unlimited view below. Joe noticed another plane, a mere dot on the horizon behind them. Ten minutes later the plane was still there, exactly the same distance away.
âFrank, do you think that pilot could be following us?â he asked.
Frank scanned the horizon to their rear.
âWhatâs the matter, boys?â Cap asked.
Joe explained, then told Jack. âHow about slowing down and letting him pass?â he suggested. âMaybe we can identify him.â
Jack throttled back but so did the pursuer, remaining far to the rear. All the boys could discern was that the plane was a low-winged, single-engine type similar to their own.
Soon Jack Wayne eased off his power and slanted down for a flawless landing at the small Green Sand Airport. The plane behind them made no attempt to land, and continued on its course.
âGuess we were mistaken about that fellow,â Cap observed as they unloaded the baggage. A few minutes later the pilot wished his passengers good luck and started back for Bayport.
Green Sand Airport was a desolate spot in rough country several miles from town. It boasted one large frame building, which was a combination hangar and administration shack.
âIâll try to arrange for transportation to the fossil area,â Bailey said.
He walked into the building, leaving the Hardys in charge of the luggage. A few seconds later Frank, peering upward, said:
âHere comes a plane. It looks like the one that was following us.â
The trim, low-winged craft droned around the field, making its traffic pattern, and floated in to a fast landing.
The pilot taxied in front of the boys, whirling his ship around and blasting them with a dusty slipstream. He cut the switch, and without so much as a nod, walked off to the hangar.
The stranger was a tall man with smooth black hair. But his eyebrows were surprisingly light, which made his eyes seem like black marbles. His nose looked like a bony blade stuck on his thin face.
âDonât like him,â Frank said crisply. âDid you notice his walk?â
âQueer,â Joe agreed. âHe slithers like a snake. I wonder who he is.â
âYou couldnât find out from his plane,â Frank observed, walking closer to it. âThe identification numbers are practically weathered off.â
âOr rubbed off on purpose,â Joe remarked. âAnd, say, look at that little insignia on the cowling.â
âA snake,â Frank whispered. âA snake eating a bird! It fits the fellow all right.â
A fuel truck rolled toward them. As it drew closer, the boys discovered that the beak-nosed pilot was riding with the driver. He alighted and strode up to the Hardys.
âWhatâs the idea of snooping around my ship?â
âWe were just looking it over,â Frank said