IN MEMORY OF L. G. WHO DIED LAST NIGHT HE WAS THE SECOND
“L. G.!” ejaculated Weston. “It must mean Louis Glenn!”
Biscayne did not register surprise. He was thoughtful. Then he spoke aloud, although he seemed to be talking to himself.
“Louis Glenn,” he said, “died a few minutes before eleven o’clock. This letter could have been written afterward—”
“Yes?” The sharp question came from Cardona. “Look at this envelope, professor. Notice its postmark. Ten o’clock!”
Biscayne seemed annoyed by the detective’s remark; then he nodded, in spite of himself. Cardona’s eyes flashed with pleasure.
“That letter,” said the detective, “was mailed before Louis Glenn died. It was mailed by some one who knew he was going to die. It may have been mailed by the slayer himself!”
He paused to let his words make an impression. Then, momentarily ignoring Professor Biscayne, Cardona stared directly at Commissioner Weston, and added a prophecy.
“Silas Harshaw was the first. Louis Glenn was the second. The murderer is still at large.
“You may count on it — there will be a third!”