The room, as I gazed round, was a most singular mixture of dates and of places. The half-panelled walls may well have belonged to the original yeoman farmer of the seventeenth century. They were ornamented, however, on the lower part by a line of well-chosen modern water-colours; while above, where yellow plaster took the place of oak, there was hung a fine collection of South American utensils and weapons, which had been brought, no doubt, by the Peruvian lady upstairs. Holmes rose, with that quick curiosity which sprang from his eager mind, and examined them with some care. He returned with his eyes full of thought.

“Hullo!” he cried. “Hullo!”

A spaniel had lain in a basket in the corner. It came slowly forward towards its master, walking with difficulty. Its hind legs moved irregularly and its tail was on the ground. It licked Ferguson’s hand.

“What is it, Mr. Holmes?”

“The dog. What’s the matter with it?”

“That’s what puzzled the vet. A sort of paralysis. Spinal meningitis, he thought. But it is passing. He’ll be all right soon — won’t you, Carlo?”

A shiver of assent passed through the drooping tail. The dog’s mournful eyes passed from one of us to the other. He knew that we were discussing his case.

“Did it come on suddenly?”

“In a single night.”

“How long ago?”

“It may have been four months ago.”

“Very remarkable. Very suggestive.”

“What do you see in it, Mr. Holmes?”

“A confirmation of what I had already thought.”

“For God’s sake, what do you think, Mr. Holmes? It may be a mere intellectual puzzle to you, but it is life and death to me! My wife a would-be murderer — my child in constant danger! Don’t play with me, Mr. Holmes. It is too terribly serious.”

The big Rugby three-quarter was trembling all over. Holmes put his hand soothingly upon his arm.

“I fear that there is pain for you, Mr. Ferguson, whatever the solution may be,” said he. “I would spare you all I can. I cannot say more for the instant, but before I leave this house I hope I may have something definite.”

“Please God you may! If you will excuse me, gentlemen, I will go up to my wife’s room and see if there has been any change.”

He was away some minutes, during which Holmes resumed his examination of the curiosities upon the wall. When our host returned it was clear from his downcast face that he had made no progress. He brought with him a tall, slim, brown-faced girl.

“The tea is ready, Dolores,” said Ferguson. “See that your mistress has everything she can wish.”

“She verra ill,” cried the girl, looking with indignant eyes at her master. “She no ask for food. She verra ill. She need doctor. I frightened stay alone with her without doctor.”

Ferguson looked at me with a question in his eyes.