“Oh, my God!” I gasped. “What is it? What does it mean?”

Holmes had sprung to his feet, and I saw his dark, athletic outline at the door of the hut, his shoulders stooping, his head thrust forward, his face peering into the darkness.

“Hush!” he whispered. “Hush!”

The cry had been loud on account of its vehemence, but it had pealed out from somewhere far off on the shadowy plain. Now it burst upon our ears, nearer, louder, more urgent than before.

“Where is it?” Holmes whispered; and I knew from the thrill of his voice that he, the man of iron, was shaken to the soul. “Where is it, Watson?”

“There, I think.” I pointed into the darkness.

“No, there!”

Again the agonised cry swept through the silent night, louder and much nearer than ever. And a new sound mingled with it, a deep, muttered rumble, musical and yet menacing, rising and falling like the low, constant murmur of the sea.

“The hound!” cried Holmes. “Come, Watson, come! Great heavens, if we are too late!”

He had started running swiftly over the moor, and I had followed at his heels. But now from somewhere among the broken ground immediately in front of us there came one last despairing yell, and then a dull, heavy thud. We halted and listened. Not another sound broke the heavy silence of the windless night.

I saw Holmes put his hand to his forehead like a man distracted. He stamped his feet upon the ground.

“He has beaten us, Watson. We are too late.”

“No, no, surely not!”

“Fool that I was to hold my hand. And you, Watson, see what comes of abandoning your charge! But, by Heaven, if the worst has happened we’ll avenge him!”

Blindly we ran through the gloom, blundering against boulders, forcing our way through gorse bushes, panting up hills and rushing down slopes, heading always in the direction whence those dreadful sounds had come. At every rise Holmes looked eagerly round him, but the shadows were thick upon the moor, and nothing moved upon its dreary face.

“Can you see anything?”

“Nothing.”

“But, hark, what is that?”