“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 can get for Birlstone, and I will meet it—­or have it met if I am too occupied.  This case is a snorter.  Don’t waste a moment in getting started.  If you can bring Mr. Holmes, please do so; for he will find something after his own heart.  We would think the whole had been fixed up for theatrical effect if there wasn’t a dead man in the middle of it.  My word! it is a snorter.”

“Your friend seems to be no fool,” remarked Holmes.

“No, sir, White Mason is a very live man, if I am any judge.”

“Well, have you anything more?”

“Only that he will give us every detail when we meet.”

“Then how did you get at Mr. Douglas and the fact that he had been horribly murdered?”

“That was in the inclosed official report.  It didn’t say ‘horrible’:  that’s not a recognized official term.  It gave the name John Douglas.  It mentioned that his injuries had been in the head, from the discharge of a shotgun.  It also mentioned the hour of the alarm, which was close on to midnight last night.  It added that the case was undoubtedly one of murder, but that no arrest had been made, and that the case was one which presented some very perplexing and extraordinary features.  That’s absolutely all we have at present, Mr. Holmes.”