"Interesting argument, but weak in spots."

"Hm—m. Which spots?"

Leaver indicated them. There could be no doubt that he had read the chapter carefully to the end. Burns put him through a severe cross-examination, but he stood the test, much to his examiner's disgust. In detective work it is usually irritating to have one's theories disproved. But he still doubted the evidence of his ears. Either John Leaver was a colder blooded deceiver than he thought him, or his powers of concentration were more than ordinarily great, that he could turn from the contemplation of a subject like the one left at the cross-roads corner, a subject which Burns was pretty sure vitally concerned him, to a mere abstract discussion of a modern sociological problem, bare of practical illustration, and dealing purely with one man's notions not yet worked out to any constructive conclusion.

"Well," said Leaver, turning suddenly to look at Burns with a smile, "are you satisfied that I have read the chapter?"

Burns also turned, met his companion's eye, and broke into a laugh. "I shall have to admit you have," said he.

"Why should you have doubted it?"

"I haven't been gone long enough for you to have read and digested it."

Leaver looked at his watch. "You were gone seventeen minutes. That's long enough to take in the argument pretty thoroughly. As to digesting it—it's indigestible. Why try?"

"No use at all. But having given my mental machinery a lot of friction I enjoyed trying to stir yours up also to irritation and discontent. But I haven't done it. You've remained calm where I grew hot. Also you've proved your ability to change the subject of your thinking as you would switch off one electric current and switch on another. It shows you're a well man."

"I must warn you, as I have done at various times in our association: 'Don't jump to conclusions.' Your first one, that I hadn't read the chapter, was wrong. I had read it. Your second one, that, after all, I had read the chapter while you were in the house, was also wrong. I had read it by the side of the brook, an hour ago."