"Precisely."
"And now there's this affair of the letter to me at the hotel. I suppose that fits into its place."
"It seems to show that someone knows more than we do about what goes on upon the moor," said Dr. Mortimer.
"And also," said Holmes, "that someone is not ill-disposed towards you, since they warn you of danger."
"Or it may be that they wish, for their own purposes, to scare me away."
"Well, of course, that is possible also.
I am very much indebted to you, Dr. Mortimer, for introducing me to a problem which presents several interesting alternatives.
But the practical point which we now have to decide, Sir Henry, is whether it is or is not advisable for you to go to Baskerville Hall."
"Why should I not go?"
"There seems to be danger."