
the cycle around the corner after the black car, and, in turn, he vanished from the courthouse
street.
Before the bearded cyclist had made his turn, a United States Mail truck appeared on the
street from behind the courthouse. The mail truck seemed to hesitate, as if the driver were
deciding which way to turn, and then, casually, the truck turned in the same direction as the
black car and the motorcycle. It went around the corner only seconds later than the motorcycle.
For some blocks the mail truck continued to follow the motorcycle. After ten blocks the bearded
cyclist had come close behind the black car. The mail truck was still behind the motorcycle. In
this order, the three vehicles proceeded along the streets of Santa Carla. In the mail truck, the
driver, wearing the blue uniform of the United States Post Office Department, flicked a switch
on his dashboard and picked up an innocent-seeming dashboard cigarette lighter.
"Code Ten, urgent. Agent 3, Harry Vincent. Come in Control Central. Code Ten, calling
Burbank, Control Central. Agent 3, Harry Vincent."
The driver watched the motorcycle and the black car ahead. The traffic was now heavy in the
center of Santa Carla. But the black car appeared neither alarmed nor in a hurry. The cyclist was
able to follow with care, and the mail truck followed the cyclist while the driver of the truck
continued to make his call over the hidden radio.
"Code Ten direct. Come in Control Central."
It was a dim blue-lighted room hidden high in the Park Avenue office building. A man, all but
hidden by the blue light of the room, bent over a large, rectangular instrument that seemed to
glow a deeper blue in the room. On the instrument there were dials and gauges and a round grid
that was a speaker. The man in the blue room operated the instrument without touching it--it
was an advanced, unique communications machine that operated only when a peculiar ring on
the hand of the man was passed over it.
"Report, Agent 3! Burbank, Central Control."
The blue glow filled the room as if it came from the walls and ceiling themselves--but no
walls or ceiling were visible. Only the man, and the communications machine that hummed
softly. No entrance or exit could be seen. No sound entered the blue room. No vibrations. No
movement. As if the blue room did not exist on this Earth, but floated somewhere in space. And,
in fact, the blue room did not exist, not to anyone but the few members of The Shadow's
Organization who knew it was there. It appeared on no plans, existed on no directory. There
were no entrances or exits known to anyone but The Shadow, his secretary and First Agent,
Margo Lane, and Burbank, the communications agent who never left the city. Secret as it was
this blue room was only one of the blue-lighted rooms hidden behind the elegant facade of the
New York offices of Lamont Cranston Enterprises, Inc. The other rooms were known only to
The Shadow himself. The headquarters of The Shadow were the ultimate in security--unseen,
unknown, and unsuspected. They had never been entered by an enemy.
The voice of the distant mailman, Harry Vincent, Agent 3 of The Shadow, entered the room.
"Observation of exterior of Santa Carla Courthouse resulted in identification of two other men
also observing. One, a thin, grey-haired man watched for four hours until arrival of mayor,
DA Gerald Symes, and ambulance. This man then left and entered a black car. The second
watcher is a bearded young man riding a motorcycle. He is now following the black car. I am
following both men. Will continue surveillance, report again later."
"Very good, Agent Vincent," Burbank said.
MARK OF THE SHADOW 13
The communications expert passed his fiery ring, a replica of the glowing ring on the hand of
The Shadow worn by all agents of the far-flung organization, over the large console. The room
became silent. Burbank passed the ring across another sensor on the console. The report was
immediately repeated from its permanent tape that would eventually enter the vast files of The