haw,' and on the farther side stretches a great rolling moor,
Lower Gill Moor, extending for ten miles and sloping gradually upward.
Here, at one side of this wilderness, is Holdernesse Hall, ten miles by
road, but only six across the moor. It is a peculiarly desolate plain. A
few moor farmers have small holdings, where they rear sheep and cattle.
Except these, the plover and the curlew are the only inhabitants until
you come to the Chesterfield high road. There is a church there,
you see, a few cottages, and an inn. Beyond that the hills become
precipitous. Surely it is here to the north that our quest must lie."

"But the bicycle?" I persisted.

"Well, well!" said Holmes, impatiently. "A good cyclist does not need a
high road. The moor is intersected with paths, and the moon was at the
full. Halloa! what is this?"

There was an agitated knock at the door, and an instant afterwards Dr.
Huxtable was in the room. In his hand he held a blue cricket-cap with a
white chevron on the peak.

"At last we have a clue!" he cried. "Thank heaven! at last we are on the
dear boy's track! It is his cap."

"Where was it found?"

"In the van of the gipsies who camped on the moor. They left on Tuesday.
To-day the police traced them down and examined their caravan. This was
found."

"How do they account for it?"

"They shuffled and lied--said that they found it on the moor on Tuesday
morning. They know where he is, the rascals! Thank goodness, they are
all safe under lock and key. Either the fear of the law or the Duke's
purse will certainly get out of them all that they know."

"So far, so good," said Holmes, when the doctor had at last left the
room. "It at least bears out the theory that it is on the side of the
Lower Gill Moor that we must hope for results. The police have really
done nothing locally, save the arrest of these gipsies. Look here,
Watson! There is a watercourse across the moor. You see it marked here
in the map. In some parts it widens into a morass. This is particularly
so in the region between Holdernesse Hall and the school. It is vain to
look elsewhere for tracks in this dry weather, but at THAT point there
is certainly a chance of some record being left. I will call you early
to-morrow morning, and you and I will try if we can throw some little
light upon the mystery."

The day was just breaking when I woke to find the long, thin form of
Holmes by my bedside. He was fully dressed, and had apparently alr