be loose⁠—but if it isn’t loose, where can it be? Who has it? Why is it held back? That’s the question that beats in my brain like a hammer. Was it, indeed, a coincidence that Lucas should meet his death on the night when the letter disappeared? Did the letter ever reach him? If so, why is it not among his papers? Did this mad wife of his carry it off with her? If so, is it in her house in Paris? How could I search for it without the French police having their suspicions aroused? It is a case, my dear Watson, where the law is as dangerous to us as the criminals are. Every man’s hand is against us, and yet the interests at stake are colossal. Should I bring it to a successful conclusion, it will certainly represent the crowning glory of my career. Ah, here is my latest from the front!” He glanced hurriedly at the note which had been handed in. “Halloa! Lestrade seems to have observed something of interest. Put on your hat, Watson, and we will stroll down together to Westminster.”