“One moment,” I asked. “Did the stable-boy, when he ran out with the dog, leave the door unlocked behind him?”

“Excellent, Watson, excellent!” murmured my companion. “The importance of the point struck me so forcibly that I sent a special wire to Dartmoor yesterday to clear the matter up. The boy locked the door before he left it. The window, I may add, was not large enough for a man to get through.

“Hunter waited until his fellow-grooms had returned, when he sent a message to the trainer and told him what had occurred. Straker was excited at hearing the account, although he does not seem to have quite realized its true significance. It left him, however, vaguely uneasy, and Mrs. Straker, waking at one in the morning, found that he was dressing. In reply to her inquiries, he said that he could not sleep on account of his anxiety about the horses, and that he intended to walk down to the stables to see that all was well. She begged him to remain at home, as she could hear the rain pattering against the window, but in spite of her entreaties he pulled on his large mackintosh and left the house.

“Mrs. Straker awoke at seven in the morning, to find that her husband had not yet returned. She dressed herself hastily, called the maid, and set off for the stables. The door was open; inside, huddled together upon a chair, Hunter was sunk in a state of absolute stupor, the favorite’s stall was empty, and there were no signs of his trainer.

“The two lads who slept in the chaff-cutting loft above the harness-room were quickly aroused. They had heard nothing during the night, for they are both sound sleepers.