“I’m afraid,” said Holmes, smiling, “that all the queen’s horses and all the queen’s men cannot avail in this matter.” He had spread out his big map of London and leaned eagerly over it. “Well, well,” said he presently with an exclamation of satisfaction, “things are turning a little in our direction at last. Why, Watson, I do honestly believe that we are going to pull it off, after all.” He slapped me on the shoulder with a sudden burst of hilarity. “I am going out now. It is only a reconnaissance. I will do nothing serious without my trusted comrade and biographer at my elbow. Do you stay here, and the odds are that you will see me again in an hour or two. If time hangs heavy get foolscap and a pen, and begin your narrative of how we saved the State.”

I felt some reflection of his elation in my own mind, for I knew well that he would not depart so far from his usual austerity of demeanour unless there was good cause for exultation. All the long November evening I waited, filled with impatience for his return. At last, shortly after nine o’clock, there arrived a messenger with a note: