that is one suggestion, Mr. Holmes."

"The other is that it has been engineered by Moriarty in the ordinary
course of business. Was there any robbery?"

"I have not heard."

"If so, it would, of course, be against the first hypothesis and in
favour of the second. Moriarty may have been engaged to engineer it on
a promise of part spoils, or he may have been paid so much down to
manage it. Either is possible. But whichever it may be, or if it is
some third combination, it is down at Birlstone that we must seek the
solution. I know our man too well to suppose that he has left anything
up here which may lead us to him."

"Then to Birlstone we must go!" cried MacDonald, jumping from his
chair. "My word! it's later than I thought. I can give you, gentlemen,
five minutes for preparation, and that is all."

"And ample for us both," said Holmes, as he sprang up and hastened to
change from his dressing gown to his coat. "While we are on our way,
Mr. Mac, I will ask you to be good enough to tell me all about it."

"All about it" proved to be disappointingly little, and yet there was
enough to assure us that the case before us might well be worthy of the
expert's closest attention. He brightened and rubbed his thin hands
together as he listened to the meagre but remarkable details. A long
series of sterile weeks lay behind us, and here at last there was a
fitting object for those remarkable powers which, like all special
gifts, become irksome to their owner when they are not in use. That
razor brain blunted and rusted with inaction.

Sherlock Holmes's eyes glistened, his pale cheeks took a warmer hue,
and his whole eager face shone with an inward light when the call for
work reached him. Leaning forward in the cab, he listened intently to
MacDonald's short sketch of the problem which awaited us in Sussex. The
inspector was himself dependent, as he explained to us, upon a
scribbled account forwarded to him by the milk train in the early hours
of the morning. White Mason, the local officer, was a personal friend,
and hence MacDonald had been notified much more promptly than is usual
at Scotland Yard when provincials need their assistance. It is a very
cold scent upon which the Metropolitan expert is generally asked to run.

"DEAR INSPECTOR MACDONALD [said the letter which he read to us]:

"Official requisition for your services is in separate envelope. This
is for your private eye. Wire me what train in the morning you ca