He was not less deeply affected, nevertheless, for, as the nurse had said, his two children were his only joy and comfort. He had no others. He had lost his first wife thirty years before. His second, a beautiful girl much younger than himself, had died shortly after the birth of her second child.

Since then, though he had retained his magnificent residence and several of his faithful and devoted servants, Mr. John Madden had found but little enjoyment in life beyond that derived from the two pretty children a loving wife had left him.

He sat gazing at Nick Carter at five o’clock that afternoon, with tears in his eyes and his hands gripping his knees—a portly, smoothly shaved man with gray hair and a remarkably attractive countenance, despite the shadow of sorrow that never left him. He was saying deliberately, with a voice rendered steady only by the strength of a superior will:

“I agree with you, Nick, in that Lucy is not at fault. That would be very unlike her. She has been faithful, always cautious and careful, during the five years she has been in my service. No, I will not censure her.”

“It really would be very unjust,” Nick said earnestly. “She did perfectly right in acting upon her impulse to aid a woman said to be in distress, and she cannot reasonably be blamed for not suspecting that she was the victim of a put-up job. Even with all of my experience, Mr. Madden, I did not at first suspect it.”

“Do you now feel sure of it?” Mr. Madden gravely questioned.

“Yes, absolutely,” said the detective. “The circumstances admit of no other interpretation. This whole business was cut and dried, carefully planned, and cleverly executed.”

“You reason that——”

“It may be told in a nutshell,” Nick interposed. “No such lad as Lucy Sloan described would have remained to watch the two children while she ran to aid a fainting woman. A well-bred boy, accustomed to obey his elders, might have done so, but not a lad of the streets. He, boylike, would have returned to learn how the woman fared and to see all that occurred.”

“Sure!” put in Patsy expressively. “I know. I’ve been there.”