"Louis," I said, suddenly, "I'll tell you what you did. You went around by the office, you saw a light there late at night, and you naturally looked in. You saw Mr. Crawford there, and he was perhaps already killed. You stepped inside and discovered this, and then you came away, and said nothing about it, lest you yourself be suspected of the crime. Incidentally you dropped two petals from the rose Elsa had given you."
Louis's answer to this accusation was a perfect storm of denials, expressed in voluble French and broken English, but all to the effect that it was not true, and that if he had seen his master dead, he would have raised an alarm.
I saw that I had not yet struck the right idea, so I tried again. "Then, Louis, you must have passed the office before Mr. Crawford was killed, w
