`This is Sir Henry Baskerville,' said Dr. Mortimer.
`Why, yes,' said he, `and the strange thing is, Mr. Sherlock Holmes, that if my friend here had not proposed coming round to you this morning I should have come on my own account. I understand that you think out little puzzles, and I've had one this morning which wants more thinking out than I am able to give it.'
`Pray take a seat, Sir Henry. Do I understand you to say that you have yourself had some remarkable experience since you arrived in London?'
`Nothing of much importance, Mr. Holmes. Only a joke, as like as not. It was this letter, if you can call it a letter, which reached me this morning.'
He laid an envelope upon the table, and we all bent over it. It was of common quality, grayish in colour. The address, `Sir Henry Baskerville, Northumberland Hotel,' was printed in rough characters; the post- mark `Charing Cross,' and the date of posting the preceding evening.
`Who knew that you were going to the Northumberland Hotel?' asked Holmes, glancing keenly across at our visitor.
`No one could have known. We only decided after I met Dr. Mortimer.'
`But Dr. Mortimer was no doubt already stopping there?'
`No, I had been staying with a friend,' said the doctor. `There was no possible indication that we intended to go to this hotel.'
`Hum! Someone seems to be very deeply interested in your movements.' Out of the envelope he took a half-sheet of foolscap paper folded into four. This he opened and spread flat upon the table. Across the middle of it a single sentence had been formed by the expedient of pasting printed words upon it. It ran:
As you value your life or your reason keep away from the moor.
The word `moor' only was printed in ink.
`Now,' said Sir Henry Baskerville, `perhaps you will tell me, Mr. Holmes, what in thunder is the meaning of that, and who it is that takes so much interest in my affairs?'
`What do you make of it, Dr. Mortimer? You must allow that there is nothing supernatural about this, at any rate?'
`No, sir, but it might very well come from someone who was convinced that the business is supernatural.'
`What business?' asked Sir Henry sharply. `It seems to me that all you gentlemen know a great deal more than I do about my own affairs.'
`You shall share our knowledge before you leave this room, Sir Henry. I promise you that,' said Sherlock Holmes. `We will confine ourselves for the present with your permission to this very interesting document, which must have been put together and posted yesterday evening. Have you yesterday's Times, Watson?'