“Equally childish. You are in the habit of doing up your boots in a certain way. I see them on this occasion fastened with an elaborate double bow, which is not your usual method of tying them. You have, therefore, had them off. Who has tied them? A bootmaker⁠—or the boy at the bath. It is unlikely that it is the bootmaker, since your boots are nearly new. Well, what remains? The bath. Absurd, is it not? But, for all that, the Turkish bath has served a purpose.”

“What is that?”

“You say that you have had it because you need a change. Let me suggest that you take one. How would Lausanne do, my dear Watson⁠—first-class tickets and all expenses paid on a princely scale?”

“Splendid! But why?”

Holmes leaned back in his armchair and took his notebook from his pocket.