"You are not mistaken," said Dr. Pye.
"Without result, of course?"
"Without result."
Dr. Vinsen stepped to the shuttered window, and Dr. Pye, lowering the gas almost to the vanishing point, turned the revolving panel, and peered through the exposed glass at the windows of the house opposite.
"Look!" he whispered, clutching his visitor's arm. "What do you see?"
"Nothing but a mass of shadows," replied Dr. Vinsen.
"Look again--closer, closer!"
"I see nothing," said Dr. Vinsen, testily. "What do you see?"
Dr. Pye did not answer, but bringing forward the small box, opened it, and sent a flashlight straight into the opposite window.
"God in heaven!" he cried, falling back affrighted.