“We know some things,” agreed Curt. “But we don’t know where Mr. Tredway’s body went—or——”

“What Griff is going to do with his Saturday afternoon,” commented Bob. “I’m going back to the plant, and pretend to finish up work, and see what happens there while it’s supposed to be closed down.”

The others agreed. Something might “break.” Actually, something did!

CHAPTER IX
STRANGE ACTIONS

Although the aircraft manufacturing plant observed a forty-four hour week, closing down on Saturday afternoons, when the three members of the Sky Squad returned, about two o’clock, they were somewhat startled to discover that their “suspects” were there.

Bob, entering the engine section, discovered Griff.

The youth was surprised, “caught in the act!” mused Bob as he saw the youth, with furtive, hasty actions, completing the wrappings of a smallish package which he hurriedly slipped into his coat as he turned aside, trying to conceal his action from Bob and then, noting that he was caught, trying to pass it off as an ordinary action.

“So that’s where some of the smaller parts are going,” Bob concluded, pretending not to be aware that anything was wrong.

“Hello,” he greeted. “I thought I’d come back and take that model engine apart, while no one was here to bother me, so I can get it straight in my head just how the valves operate.”

“Yeah?” Griff was inclined to be gruff, and as he tinkered around trying to pretend to be busy, but, to Bob’s notion, watching the member of the Sky Squad, the latter gave every impression he could of ignorance that he was being supervised, studied, observed.