It was evening before we reached the little town of Tavistock, which lies, like the boss of a shield, in the middle of the huge circle of Dartmoor. Two gentlemen were awaiting us in the station - the one a tall, fair man with lion-like hair and beard and curiously penetrating light blue eyes; the other a small, alert person, very neat and dapper, in a frock-coat and gaiters, with trim little side-whiskers and an eyeglass. The latter was Colonel Ross, the well-known sportsman; the other, Inspector Gregory; a man who was rapidly making his name in the English detective service.

“I am delighted that you have come down, Mr. Holmes,” said the colonel. “The inspector here has done all that could possibly be suggested, but I wish to leave no stone unturned in trying to avenge poor Straker and in recovering my horse.”

“Have there been any fresh developments?” asked Holmes.

“I am sorry to say that we have made very little progress,” said the inspector. “We have an open carriage outside, and as you would no doubt like to see the place before the light fails, we might talk it over as we drive.”

A minute later we were all seated in a comfortable landau and were rattling through the quaint old Devonshire city. Inspector Gregory was full of his case and poured out a stream of remarks, while Holmes threw in an occasional question or interjection. Colonel Ross leaned back with his arms folded and his hat tilted over his eyes, while I listened with interest to the dialogue of the two detectives. Gregory was formulating his theory, which was almost exactly what Holmes had foretold in the train.

“The net is drawn pretty close round Fitzroy Simpson,” he remarked, “and I believe myself that he is our man. At the same time I recognize that the evidence is purely circumstantial, and that some new development may upset it.”

“How about Straker’s knife?”

“We have quite come to the conclusion that he wounded himself in his fall.”

“My friend Dr. Watson made that suggestion to me as we came down. If so, it would tell against this man Simpson.”

“Undoubtedly. He has neither a knife nor any sign of a wound. The evidence against him is certainly very strong. He had a great interest in the disappearance of the favourite. He lies under suspicion of having poisoned the stable-boy; he was undoubtedly out in the storm; he was armed with a heavy stick, and his cravat was found in the dead man’s hand. I really think we have enough to go before a jury.”

Holmes shook his head. “A clever counsel would tear it all to rags,” said he. “Why should he take the horse out of the stable? If he wished to injure it, why could he not do it there? Has a duplicate key been found in his possession? What chemist sold him the powdered opium? Above all, where could he, a stranger to the district, hide a horse, and such a horse as this? What is his own explanation as to the paper which he wished the maid to give to the stable-boy?”

“He says that it was a ten-pound note. One was found in his purse. But your other difficulties are not so formidable as they seem. He is not a stranger to the district. He has twice lodged at Tavistock in the summer. The opium was probably brought from London. The key, having served its purpose, would be hurled away. The horse may be at the bottom of one of the pits or old mines upon the moor.”

“What does he say about the cravat?”

“He acknowledges that it is his and declares that he had lost it. But a new element has been introduced into the case which may account for his leading the horse from the stable.”

Holmes pricked up his ears.