"Monsieur le Préfet," he said, "you waited in vain last night for the fourth letter to make its appearance. We shall now be able, by an unexpected miracle of chance, to be present at the delivery of the letter. You will then know that it was the same hand that committed all the crimes—and you will know whose hand that was."
And, turning to Mazeroux:
"Sergeant, will you please make the room as dark as you can? The shutters are gone; but you might draw the curtains across the windows and close the doors. Monsieur le Préfet, is it by accident that the electric light is on?"
"Yes, by accident. We will have it turned out."
"One moment. Have any of you gentlemen a pocket lantern about you? Or, no, it doesn't matter. This will do."
There was a candle in a sconce. He took it and lit it.
Then he switched off the electric light.
There was a half darkness, amid which the flame of the candle flickered in the draught from the windows. Don Luis protected the flame with his hand and moved to the table.
"I do not think that we shall be kept waiting long," he said. "As I foresee it, there will be only a few seconds before the facts speak for themselves and better than I could do."
Those few seconds, during which no one broke the silence, were unforgettable. M. Desmalions has since declared, in an interview in which he ridicules himself very cleverly, that his brain, over-stimulated by the fatigues of the night and by the whole scene before him, imagined the most unlikely events, such as an invasion of the house by armed assailants, or the apparition of ghosts and spirits.