“Certainly is,” Curt agreed.

“Thanks,” Bob spoke to the watchman. “As long as we’re here,” he turned to his chums. “Let’s bring in our bikes and get some more of those books on metal alloys Barney told us about.”

“The boss is here, himself,” the watchman explained. “Go ahead.”

Barney was working late!

“His office is lighted,” Al commented. “Let’s stop in and tell him about the note and the autograph.”

“And about Lang.”

“He must know Lang hopped off,” Curt told Bob.

“Yes—the crate made enough noise—unless he’s awfully busy.”

Barney was busy enough, but he had heard the take-off, he admitted.

“I’m trying to check up on the firm’s books.” Barney waved a hand toward the pile of heavy volumes, ledgers, daybooks, indexes and others, scattered on his desk. “I can’t find out what way they’re doing it, but something’s being ‘worked’ about the materials.”