"There's someone in here," cried Lestrade. "I can hear a movement. Open this door!"

A faint moaning and rustling came from within. Holmes struck the door just over the lock with the flat of his foot and it flew open. Pistol in hand, we all three rushed into the room.

But there was no sign within it of that desperate and defiant villain whom we expected to see. Instead we were faced by an object so strange and so unexpected that we stood for a moment staring at it in amazement.

The room had been fashioned into a small museum, and the walls were lined by a number of glass-topped cases full of that collection of butterflies and moths the formation of which had been the relaxation of this complex and dangerous man. In the centre of this room there was an upright beam, which had been placed at some period as a support for the old worm-eaten baulk of timber which spanned the roof. To this post a figure was tied, so swathed and muffled in the sheets which had been used to secure it that one could not for the moment tell whether it was that of a man or a woman. One towel passed round the throat and was secured at the back of the pillar. Another covered the lower part of the face, and over it two dark eyes—eyes full of grief and shame and a dreadful questioning—stared back at us. In a minute we had torn off the gag, unswathed the bonds, and Mrs. Stapleton sank upon the floor in front of us. As her beautiful head fell upon her chest I saw the clear red weal of a whiplash across her neck.

"The brute!" cried Holmes. "Here, Lestrade, your brandy-bottle! Put her in the chair! She has fainted from ill-usage and exhaustion."

She opened her eyes again.

"Is he safe?" she asked. "Has he escaped?"

"He cannot escape us, madam."

"No, no, I did not mean my husband. Sir Henry? Is he safe?"

"Yes."

"And the hound?"

"It is dead."

She gave a long sigh of satisfaction.

"Thank God! Thank God! Oh, this villain! See how he has treated me!" She shot her arms out from her sleeves, and we saw with horror that they were all mottled with bruises. "But this is nothing—nothing! It is my mind and soul that he has tortured and defiled. I could endure it all, ill-usage, solitude, a life of deception, everything, as long as I could still cling to the hope that I had his love, but now I know that in this also I have been his dupe and his tool." She broke into passionate sobbing as she spoke.

"You bear him no good will, madam," said Holmes. "Tell us then where we shall find him. If you have ever aided him in evil, help us now and so atone."

"There is but one place where he can have fled," she answered. "There is an old tin mine on an island in the heart of the mire. It was there that he kept his hound and there also he had made preparations so that he might have a refuge. That is where he would fly."

The fog-bank lay like white wool against the window. Holmes held the lamp towards it.

"See," said he. "No one could find his way into the Grimpen Mire tonight."

She laughed and clapped her hands. Her eyes and teeth gleamed with fierce merriment.

"He may find his way in, but never out," she cried. "How can he see the guiding wands tonight? We planted them together, he and I, to mark the pathway through the mire. Oh, if I could only have plucked them out today. Then indeed you would have had him at your mercy!"

It was evident to us that all pursuit was in vain until the fog had lifted. Meanwhile we left Lestrade in possession of the house while Holmes and I went back with the baronet to Baskerville Hall. The story of the Stapletons could no longer be withheld from him, but he took the blow bravely when he learned the truth about the woman whom he had loved. But the shock of the night's adventures had shattered his nerves, and before morning he lay delirious in a high fever under the care of Dr. Mortimer. The two of them were destined to travel together round the world before Sir Henry had become once more the hale, hearty man that he had been before he became master of that ill-omened estate.

And now I come rapidly to the conclusion of this singular narrative, in which I have tried to make the reader share those dark fears and vague surmises which clouded our lives so long and ended in so tragic a manner. On the morning after the death of the hound the fog had lifted and we were guided by Mrs. Stapleton to the point where they had found a pathway through the bog. It helped us to realize the horror of this woman's life when we saw the eagerness and joy with which she laid us on her husband's track. We left her standing upon the thin peninsula of firm, peaty soil which tapered out into the widespread bog. From the end of it a small wand planted here and there showed where the path zigzagged from tuft to tuft of rushes among those green-scummed pits and foul quagmires which barred the way to the stranger. Rank reeds and lush, slimy water-plants sent an odour of decay and a heavy miasmatic vapour onto our faces, while a false step plunged us more than once thigh-deep into the dark, quivering mire, which shook for yards in soft undulations around our feet. Its tenacious grip plucked at our heels as we walked, and when we sank into it it was as if some malignant hand was tugging us down into those obscene depths, so grim and purposeful was the clutch in which it held us. Once only we saw a trace that someone had passed that perilous way before us. From amid a tuft of cotton grass which bore it up out of the slime some dark thing was projecting. Holmes sank to his waist as he stepped from the path to seize it, and had we not been there to drag him out he could never have set his foot upon firm land again. He held an old black boot in the air. "Meyers, Toronto," was printed on the leather inside.

"It is worth a mud bath," said he. "It is our friend Sir Henry's missing boot."

"Thrown there by Stapleton in his flight."

"Exactly. He retained it in his hand after using it to set the hound upon the track. He fled when he knew the game was up, still clutching it. And he hurled it away at this point of his flight. We know at least that he came so far in safety."

But more than that we were never destined to know, though there was much which we might surmise. There was no chance of finding footsteps in the mire, for the rising mud oozed swiftly in upon them, but as we at last reached firmer ground beyond the morass we all looked eagerly for them. But no slightest sign of them ever met our eyes. If the earth told a true story, then Stapleton never reached that island of refuge towards which he struggled through the fog upon that last night. Somewhere in the heart of the great Grimpen Mire, down in the foul slime of the huge morass which had sucked him in, this cold and cruel-hearted man is forever buried.

Many traces we found of him in the bog-girt island where he had hid his savage ally. A huge driving-wheel and a shaft half-filled with rubbish showed the position of an abandoned mine. Beside it were the crumbling remains of the cottages of the miners, driven away no doubt by the foul reek of the surrounding swamp. In one of these a staple and chain with a quantity of gnawed bones showed where the animal had been confined. A skeleton with a tangle of brown hair adhering to it lay among the debris.

"A dog!" said Holmes. "By Jove, a curly-haired spaniel. Poor Mortimer will never see his pet again. Well, I do not know that this place contains any secret which we have not already fathomed. He could hide his hound, but he could not hush its voice, and hence came those cries which even in daylight were not pleasant to hear. On an emergency he could keep the hound in the out-house at Merripit, but it was always a risk, and it was only on the supreme day, which he regarded as the end of all his efforts, that he dared do it. This paste in the tin is no doubt the luminous mixture with which the creature was daubed. It was suggested, of course, by the story of the family hell-hound, and by the desire to frighten old Sir Charles to death. No wonder the poor devil of a convict ran and screamed, even as our friend did, and as we ourselves might have done, when he saw such a creature bounding through the darkness of the moor upon his track. It was a cunning device, for, apart from the chance of driving your victim to his death, what peasant would venture to inquire too closely into such a creature should he get sight of it, as many have done, upon the moor? I said it in London, Watson, and I say it again now, that never yet have we helped to hunt down a more dangerous man than he who is lying yonder"—he swept his long arm towards the huge mottled expanse of green-splotched bog which stretched away until it merged into the russet slopes of the moor.