“Snap goes our third thread, and we end where we began,” said he. “The cunning rascal! He knew our number, knew that Sir Henry Baskerville had consulted me, spotted who I was in Regent Street, conjectured that I had got the number of the cab and would lay my hands on the driver, and so sent back this audacious message. I tell you, Watson, this time we have got a foeman who is worthy of our steel. I’ve been checkmated in London. I can only wish you better luck in Devonshire. But I’m not easy in my mind about it.”

“About what?”

“About sending you. It’s an ugly business, Watson, an ugly, dangerous business, and the more I see of it the less I like it. Yes, my dear fellow, you may laugh, but I give you my word that I shall be very glad to have you back safe and sound in Baker Street once more.”