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158 "Your folks ought to be on guard."

"They are on guard—and dad has hired a detective to keep his eye on Crabtree and Sobber."

"What about your father, Dick? You wrote that he was worried over some business matter."

"He is, and Uncle Randolph is worried, too, Dora. It's some business you wouldn't understand—something about some western investment. You see dad and uncle are getting old and they can't watch things as they used to and Uncle Randolph is all wrapped up in scientific farming, just as he always was. I sometimes think it's time I took hold of business matters and helped them."

"Then you'd have to leave Brill, wouldn't you?"

Yes; but I'd not mind that—I have a pretty good education even now, and I could study in my spare moments. I could take a short course, instead of one of the long ones. And then, Dora, that would help out another way," went on Dick in a lower voice, and looking over his shoulder to make sure that the others were not listening. But the others had walked off to to rear of the big biplane.

"Another way? How?" And Dora looked at him wonderingly.

"Oh, you know well enough."

"No, I don't," she replied; but two bright spots