“And you didn’t see anything else, anything that attracted your attention?”

“No, nothing—” Knoll did not finish his sentence, but began another instead. He had suddenly remembered something which had seemed to him of no importance before. “There was a light that went out suddenly.”

“Where?”

“In the side of the house that I could see from my place. There was a lamp in the last window of the second story, a lamp with a red shade. That lamp went out all at once.”

“Was the window open?”

“Yes.”

“There was a strong wind that night, might not the wind have blown the lamp out?”

“No, that wasn’t it,” said Knoll, rising hastily.

“Well, how was it?” asked Muller calmly.

“A hand put out the lamp.”