"Good. If it is so that Lawrence was at home when Barker called yesterday evening and Barker then remained eighteen minutes; whereas this afternoon, when we know that no one but Mrs. Lawrence was there—and he remained but four minutes—it is fairly reasonable to suppose that he was calling to see Mr. Lawrence."

"I think you're right, Carroll."

"I'm not at all convinced about that. But if we're proceeding along lines of pure logic, that is the answer."

"How about the man who drove up with the kid sister?"

Carroll smiled. "I'm sure he had nothing whatever to do with the murder."

"Good Lord! I didn't think he had. But still he may have been a friend, and—"

"That man was all right. I know that."

"You know?" Leverage was incredulous.

"Yes." Carroll grinned. "I was the man!"

"You—? Holy sufferin' mackerel! Sa-a-ay! Was that chicken I seen you with downtown, Lawrence's sister-in-law?"