“Do you like her, Jack?” Holmes turned suddenly upon the boy. His expressive mobile face shadowed over, and he shook his head.

“Jacky has very strong likes and dislikes,” said Ferguson, putting his arm round the boy. “Luckily I am one of his likes.”

The boy cooed and nestled his head upon his father’s breast. Ferguson gently disengaged him.

“Run away, little Jacky,” said he, and he watched his son with loving eyes until he disappeared. “Now, Mr. Holmes,” he continued when the boy was gone, “I really feel that I have brought you on a fool’s errand, for what can you possibly do save give me your sympathy? It must be an exceedingly delicate and complex affair from your point of view.”

“It is certainly delicate,” said my friend with an amused smile, “but I have not been struck up to now with its complexity. It has been a case for intellectual deduction, but when this original intellectual deduction is confirmed point by point by quite a number of independent incidents, then the subjective becomes objective and we can say confidently that we have reached our goal. I had, in fact, reached it before we left Baker Street, and the rest has merely been observation and confirmation.”

Ferguson put his big hand to his furrowed forehead.

“For heaven’s sake, Holmes,” he said hoarsely; “if you can see the truth in this matter, do not keep me in suspense. How do I stand? What shall I do? I care nothing as to how you have found your facts so long as you have really got them.”

“Certainly I owe you an explanation, and you shall have it. But you will permit me to handle the matter in my own way? Is the lady capable of seeing us, Watson?”

“She is ill, but she is quite rational.”

“Very good. It is only in her presence that we can clear the matter up. Let us go up to her.”

“She will not see me,” cried Ferguson.

“Oh, yes, she will,” said Holmes. He scribbled a few lines upon a sheet of paper. “You at least have the entree, Watson. Will you have the goodness to give the lady this note?”

I ascended again and handed the note to Dolores, who cautiously opened the door. A minute later I heard a cry from within, a cry in which joy and surprise seemed to be blended. Dolores looked out.

“She will see them. She will leesten,” said she.

At my summons Ferguson and Holmes came up. As we entered the room Ferguson took a step or two towards his wife, who had raised herself in the bed, but she held out her hand to repulse him. He sank into an armchair, while Holmes seated himself beside him, after bowing to the lady, who looked at him with wide-eyed amazement.

“I think we can dispense with Dolores,” said Holmes. “Oh, very well, madame, if you would rather she stayed I can see no objection. Now, Mr. Ferguson, I am a busy man with many calls, and my methods have to be short and direct. The swiftest surgery is the least painful. Let me first say what will ease your mind. Your wife is a very good, a very loving, and a very ill-used woman.”

Ferguson sat up with a cry of joy.

“Prove that, Mr. Holmes, and I am your debtor forever.”

“I will do so, but in doing so I must wound you deeply in another direction.”

“I care nothing so long as you clear my wife. Everything on earth is insignificant compared to that.”

“Let me tell you, then, the train of reasoning which passed through my mind in Baker Street. The idea of a vampire was to me absurd. Such things do not happen in criminal practice in England. And yet your observation was precise. You had seen the lady rise from beside the child’s cot with the blood upon her lips.”

“I did.”