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.