“To hear a hound upon the moor would not work a hard man like this convict into such a paroxysm of terror that he would risk recapture by screaming wildly for help. By his cries he must have run a long way after he knew the animal was on his track. How did he know?”

“A greater mystery to me is why this hound, presuming that all our conjectures are correct—”

“I presume nothing.”

“Well, then, why this hound should be loose tonight. I suppose that it does not always run loose upon the moor. Stapleton would not let it go unless he had reason to think that Sir Henry would be there.”

“My difficulty is the more formidable of the two, for I think that we shall very shortly get an explanation of yours, while mine may remain forever a mystery. The question now is, what shall we do with this poor wretch’s body? We cannot leave it here to the foxes and the ravens.”

“I suggest that we put it in one of the huts until we can communicate with the police.”

“Exactly. I have no doubt that you and I could carry it so far. Halloa, Watson, what’s this? It’s the man himself, by all that’s wonderful and audacious! Not a word to show your suspicions—not a word, or my plans crumble to the ground.”

A figure was approaching us over the moor, and I saw the dull red glow of a cigar. The moon shone upon him, and I could distinguish the dapper shape and jaunty walk of the naturalist. He stopped when he saw us, and then came on again.

“Why, Dr. Watson, that’s not you, is it? You are the last man that I should have expected to see out on the moor at this time of night. But, dear me, what’s this? Somebody hurt? Not—don’t tell me that it is our friend Sir Henry!” He hurried past me and stooped over the dead man. I heard a sharp intake of his breath and the cigar fell from his fingers.

“Who—who’s this?” he stammered.

“It is Selden, the man who escaped from Princetown.”

Stapleton turned a ghastly face upon us, but by a supreme effort he had overcome his amazement and his disappointment. He looked sharply from Holmes to me. “Dear me! What a very shocking affair! How did he die?”

“He appears to have broken his neck by falling over these rocks. My friend and I were strolling on the moor when we heard a cry.”

“I heard a cry also. That was what brought me out. I was uneasy about Sir Henry.”

“Why about Sir Henry in particular?” I could not help asking.

“Because I had suggested that he should come over. When he did not come I was surprised, and I naturally became alarmed for his safety when I heard cries upon the moor. By the way”—his eyes darted again from my face to Holmes’s—“did you hear anything else besides a cry?”

“No,” said Holmes; “did you?”