“That’s a good name for it,” conceded Garry.

“It’s the right name for it,” said Tom, with that blunt outspokenness which had a savor of reprimand but which the boys usually took in good part.

“That’s just about what I’d say it was,” Garry agreed.

“That’s what you ought to say it was,” said Tom, “because that’s what it was.”

Doc winked at Garry, and Connie smiled.

“We get you, Steven,” he said to Tom.

“Even before there were any flying machines, scouts in Africa knew about trail ghosts,” Tom said. “They’re all over, only you can’t see them—except in special ways—like this. You can only see them for about twenty seconds when you open your eyes. If I’d have told you to look cross-eyed you could have seen it better.”

“Wouldn’t that have been a sight for mother’s boy!” said Garry. “Swinging on a thin branch on the top of a tree and looking cross-eyed at a ghost! I’d have had that Cheshire cat in Alice in Wonderland beaten a mile.”

“Captain Crawford who died,” said Tom, “picked up a lot of them. The higher up you are the better. In an aeroplane you needn’t even shut your eyes.”

“Well, truth is stranger than friction, as Roy says,” said Connie; “this trail we’re on now is no ghost, anyway—hey, Tomasso?”