"I harm no one, sir," she murmured. "I only wish to be let alone that I may complete the work of vengeance which I have begun against the man who has brought so much misery to me and mine."

"Just so, madam, just so," answered Caleb Hook, soothingly. "You refer to Mr. Callister, no doubt, who is now in the room below. I stand ready to help you in your work if I can."

"But you are the detective who arrested my—Frank, I mean."

"I did, but I have stood his friend from that night until now. I am anxious to help him and all belonging to him. Are you not the person to whom I spoke at the Trinity church-yard wall on the night of the arrest? Did you not tell me that Frank Mansfield was your son, and that he robbed the Webster bank?"

"No, no, I was mistaken. I was mad!" exclaimed the woman, springing forward wildly. "I have no son, he robbed no bank. Go away and leave me alone."

"'Tain't no use to make him mad, missus," whispered the newsboy. "Frank trusts him an' I guess the best thing will be for us to trust him too."

"You are right, Jerry," said the detective quietly. "Neither this good lady nor yourself have anything to fear from me."

"Ha! ha! ha! Ha! ha! ha! You can just bet your life the detective will never get into this little racket—never in the world."

From the room below these words, accompanied by loud and boisterous laughter, suddenly burst forth, the sound finding easy passage through the uncovered stove pipe hole in the floor.

The effect upon the woman was electrical.