“No, no, I cannot forget those terrible words nor the look upon his face. I will not see him. Go now. You can do nothing for me. Tell him only one thing. I want my child. I have a right to my child. That is the only message I can send him.” She turned her face to the wall and would say no more.

I returned to the room downstairs, where Ferguson and Holmes still sat by the fire. Ferguson listened moodily to my account of the interview.

“How can I send her the child?” he said. “How do I know what strange impulse might come upon her? How can I ever forget how she rose from beside it with its blood upon her lips?” He shuddered at the recollection. “The child is safe with Mrs. Mason, and there he must remain.”

A smart maid, the only modern thing which we had seen in the house, had brought in some tea. As she was serving it the door opened and a youth entered the room. He was a remarkable lad, pale-faced and fair-haired, with excitable light blue eyes which blazed into a sudden flame of emotion and joy as they rested upon his father. He rushed forward and threw his arms round his neck with the abandon of a loving girl.

“Oh, daddy,” he cried, “I did not know that you were due yet. I should have been here to meet you. Oh, I am so glad to see you!”

Ferguson gently disengaged himself from the embrace with some little show of embarrassment.

“Dear old chap,” said he, patting the flaxen head with a very tender hand. “I came early because my friends, Mr. Holmes and Dr. Watson, have been persuaded to come down and spend an evening with us.”

“Is that Mr. Holmes, the detective?”

“Yes.”

The youth looked at us with a very penetrating and, as it seemed to me, unfriendly gaze.

“What about your other child, Mr. Ferguson?” asked Holmes. “Might we make the acquaintance of the baby?”

“Ask Mrs. Mason to bring baby down,” said Ferguson. The boy went off with a curious, shambling gait which told my surgical eyes that he was suffering from a weak spine. Presently he returned, and behind him came a tall, gaunt woman bearing in her arms a very beautiful child, dark-eyed, golden-haired, a wonderful mixture of the Saxon and the Latin. Ferguson was evidently devoted to it, for he took it into his arms and fondled it most tenderly.

“Fancy anyone having the heart to hurt him,” he muttered as he glanced down at the small, angry red pucker upon the cherub throat.

It was at this moment that I chanced to glance at Holmes and saw a most singular intentness in his expression. His face was as set as if it had been carved out of old ivory, and his eyes, which had glanced for a moment at father and child, were now fixed with eager curiosity upon something at the other side of the room. Following his gaze I could only guess that he was looking out through the window at the melancholy, dripping garden. It is true that a shutter had half closed outside and obstructed the view, but none the less it was certainly at the window that Holmes was fixing his concentrated attention. Then he smiled, and his eyes came back to the baby. On its chubby neck there was this small puckered mark. Without speaking, Holmes examined it with care. Finally he shook one of the dimpled fists which waved in front of him.

“Good-bye, little man. You have made a strange start in life. Nurse, I should wish to have a word with you in private.”

He took her aside and spoke earnestly for a few minutes. I only heard the last words, which were: “Your anxiety will soon, I hope, be set at rest.” The woman, who seemed to be a sour, silent kind of creature, withdrew with the child.

“What is Mrs. Mason like?” asked Holmes.

“Not very prepossessing externally, as you can see, but a heart of gold, and devoted to the child.”