“Not at all. Mrs. Black was engaged to your uncle, but she did not love him. She was marrying for a fortune. Then she heard that Landon, whom she has known for years, was coming East, and she connived with Stryker to put the old gentleman out of the way.”

“Uncle Rowly was only in the fifties, that is not old.”

“Old compared with Kane Landon. And as I told you, Miss Trowbridge, this is largely theory. But many facts support it, and it ought to be looked into.”

“Then the thing to do, is to lay it before Judge Hoyt. He will know what is the best way to sift the theory to a conclusion.”

But when the three were together in Hoyt’s office, and Duane told the whole story of his interview with Jim Lindsay, the detective laid aside his pretence of still suspecting Stryker and enumerated his reasons for looking in the direction of Landon.

“That must be a true bill about his meeting that adventuress in the library,” he argued; “it couldn’t have been anybody else but Mrs. Black.”

“Why couldn’t it?” Avice spoke fiercely, and her brown eyes were full of indignant amazement at the tale Duane had told.

“Lindsay saw her picture in the papers, and anyway, it all fits in. You see, those two were pals in Denver, and they kept it quiet. That’s enough to rouse suspicion in itself. The old butler is no sort of a suspect. To be sure he wanted the money to get his insurance before the time was up, but he wouldn’t commit murder for that——”

“Why wouldn’t he?” demanded Avice, “as likely as that a man’s own nephew would do it?”

“He isn’t an own nephew,” said Judge Hoyt, slowly. “I don’t want to subscribe to your theory, Duane, but I’m startled at this library story. Of course, Landon had a right to meet anybody he chose and wherever he chose, but why keep secret his previous acquaintance with the widow?”