"Excellent! This is a colleague, Watson, after our own heart. But the marks?"
"He had left his own marks all over that small patch of gravel. I could discern no others."
Sherlock Holmes struck his hand against his knee with an impatient gesture.
"If I had only been there!" he cried. "It is evidently a case of extraordinary interest, and one which presented immense opportunities to the scientific expert. That gravel page upon which I might have read so much has been long ere this smudged by the rain and defaced by the clogs of curious peasants. Oh, Dr. Mortimer, Dr. Mortimer, to think that you should not have called me in! You have indeed much to answer for."
"I could not call you in, Mr. Holmes, without disclosing these facts to the world, and I have already given my reasons for not wishing to do so. besides, besides "
"Why do you hesitate?"
"There is a realm in which the most acute and most experienced of detectives is helpless."
"You mean that the thing is super-natural?"
"I did not positively say so."
"No, but you evidently think it."
"Since the tragedy, Mr. Holmes, there have come to my ears several incidents which are hard to reconcile with the settled order of Nature."
"For example?"
"I find that before the terrible event occurred several people had seen a creature upon the moor which corresponds with this Baskerville demon, and which could not possibly be any animal known to science. They all agreed that it was a huge creature, luminous, ghastly, and spectral. I have cross-examined these men, one of them a hard-headed countryman, one a farrier, and one a moorland farmer, who all tell the same story of this dreadful apparition, exactly corresponding to the hell-hound of
