s plans now that he knows
you are here?"

"It may cause him to be more cautious, or it may drive him to desperate
measures at once. Like most clever criminals, he may be too confident in
his own cleverness and imagine that he has completely deceived us."

"Why should we not arrest him at once?"

"My dear Watson, you were born to be a man of action. Your instinct is
always to do something energetic. But supposing, for argument's sake,
that we had him arrested tonight, what on earth the better off should
we be for that? We could prove nothing against him. There's the devilish
cunning of it! If he were acting through a human agent we could get some
evidence, but if we were to drag this great dog to the light of day it
would not help us in putting a rope round the neck of its master."

"Surely we have a case."

"Not a shadow of one--only surmise and conjecture. We should be laughed
out of court if we came with such a story and such evidence."

"There is Sir Charles's death."

"Found dead without a mark upon him. You and I know that he died of
sheer fright, and we know also what frightened him, but how are we to
get twelve stolid jurymen to know it? What signs are there of a hound?
Where are the marks of its fangs? Of course we know that a hound does
not bite a dead body and that Sir Charles was dead before ever the
brute overtook him. But we have to prove all this, and we are not in a
position to do it."

"Well, then, tonight?"

"We are not much better off tonight. Again, there was no direct
connection between the hound and the man's death. We never saw the
hound. We heard it, but we could not prove that it was running upon this
man's trail. There is a complete absence of motive. No, my dear fellow;
we must reconcile ourselves to the fact that we have no case at present,
and that it is worth our while to run any risk in order to establish
one."

"And how do you propose to do so?"

"I have great hopes of what Mrs. Laura Lyons may do for us when the
position of affairs is made clear to her. And I have my own plan as
well. Sufficient for tomorrow is the evil thereof; but I hope before the
day is past to have the upper hand at last."

I could draw nothing further from him, and he walked, lost in thought,
as far as the Baskerville gates.

"Are you coming up?"

"Yes; I see no reason for further concealment. But one last word,
Watson. Say nothing of the hound to Sir Henry. Let him think that
Selden's death was a