“Burbank.”
The weird tone echoed from the walls of the shaft. It was recognized by the man in the elevator.
“Yes,” came the response.
“You are alone?”
“Yes.”
“The car can come no higher?”
“No.”
The Shadow was about to step to the top of the elevator. He paused to listen. There was no sign that the men in the penthouse were returning.
The man in black pressed the button beside the elevator door. It did not respond.
“Burbank,” he whispered, “do you get a signal light from this floor?”