He had stated that the killings had been ended. He had given no proof to support his statement.
The proof was one that Cardona dared not reveal. His proof was — the word of The Shadow!
Why did Cardona trust that strange, mysterious voice that had spoken over the telephone from nowhere?
The detective’s only answer was that he had heard the voice in the past; and its words had always proven true.
“I’m going down to the lobby,” said Mayhew. “We’re not going to miss out tonight. That chute has a glass front. Every time a letter drops, it will be reported.
“Before, I had the boys looking for people. Tonight, they’re watching for letters, too. There’s a post-office man down there, ready to open the box.
“Good!” said Cardona. “I’ll come down with you. I want to meet the commissioner when he comes in.”
Doctor Fredericks joined the two detectives as they went to the elevator. The three descended to the ground floor.
Mayhew instructed the operator not to go above the ninth story. While Cardona waited in the lobby, Mayhew went up the stairs.
A few minutes later, Commissioner Weston entered the hotel with Professor Biscayne.