“Yes,” agreed the detective, “let’s drop all worry about the less important thefts, the deliberate damage to the airplanes—and look for the man who flew that brown airplane!”

“Will we?”

Bob asked it as a question, then he repeated it as an exclamation.

“Will we!”

CHAPTER XIV
THE SKY SQUAD DISOBEYS

Both Curt and Al listened eagerly while Bob related the details of the Sunday conference with the detective.

He gave them the information imparted by Barney.

“Not a thing wrong with the Silver Flash?” repeated Al. “Then that brown crate must have driven it down—but why?”

“Maybe some revengeful pilot Mr. Tredway had discharged,” suggested Curt. “At any rate there must have been some motive to make a man do anything as terrible as that. But how are we going to locate the brown ship?”

“I still have that message we discovered on the seat, and then picked up in the dewy grass.” Al produced it, dry but smudged and crumpled, from his pocket card and identification case. “We might compare the writing with the—well, say with the books in the aircraft plant, and with everybody’s writing.”