"Sure, you can," said Gus; and Bill nodded, adding: "We have only a limited time now, and any help will count a lot."

Going down to the bank, Bill again outlined the work in detail, suggesting the purchases of even better machinery and tools, of only the best grades of materials. There must be another trip to the city, the most strenuous part of the work.

"We'll get it through on time, I guess," said Bill.

"I'm not thinking so much of that as about how that fire started," said
Gus.

"It couldn't have been any of our chemicals, could it?"

"Chem—? My eye! Don't you know, old chap? I'll bet Mr. Hooper and Grace have the correct suspicion."

"More crooked business? You don't mean—"

"Sure, I do! Thad, of course. And, Bill, we're going to get him, sooner or later. Mr. Hooper won't want to stand this sort of thing forever. I've got a hunch that we're not through with that game yet."

CHAPTER XX

"TO LABOR AND TO WAIT"