Lestrade’s face had begun to grow red and angry. “I don’t know whether you are playing a game with us, Mr. Sherlock Holmes,” said he. “If you know anything, you can surely say it without all this tomfoolery.”

“I assure you, my good Lestrade, that I have an excellent reason for everything that I do. You may possibly remember that you chaffed me a little, some hours ago, when the sun seemed on your side of the hedge, so you must not grudge me a little pomp and ceremony now. Might I ask you, Watson, to open that window, and then to put a match to the edge of the straw?”

I did so, and driven by the draught a coil of gray smoke swirled down the corridor, while the dry straw crackled and flamed.

“Now we must see if we can find this witness for you, Lestrade. Might I ask you all to join in the cry of ‘Fire!’? Now then; one, two, three⁠—”

“Fire!” we all yelled.