
persisted, he decided that it was the valet.
He went to the door, opened it cautiously. He saw no one when he peered into the corridor. It was then
that he remembered the Servidor. Stepping back into the room, he locked the door again.
The Servidor was a simple and useful device that Thurnig had found in many hotels. The door, with its big
bulge, had two panels, with a space between. The outside panel could be unlocked by hotel employees,
to pick up or leave laundry or clothes. The inner panel was controlled by the guest within the room.
Thanks to these doors within doors, the employees stayed out of the rooms, and that pleased Thurnig.
He was a bit absent-minded; apt to forget important matters, even the twenty thousand dollars that was
so important to him. Remembering the money at this moment, Thurnig pulled the wallet from his hip, to
lay it in the suitcase.
Returning to the door, he opened his side of the Servidor, expecting to find his pressed tuxedo.
Instead of the suit, Thurnig saw an upright box made of metal. It was wedged in the Servidor; from its
top came a wire that was hooked to the panel that Thurnig had just opened. The wire actuated a shutter
device in the top of the metal box.
Thurnig saw the shutter slide open. He heard its click; heard the hiss that followed it. From the box came
a smoky, yellow vapor that licked lazily toward the man who viewed it. Before Thurnig recovered from
his astoundment, he was choking, coughing, from the effects of a nauseous gas.
The vapor's immediate effect was to stagger him. He wavered, rooted to the spot where he stood. Then
came the instinctive impulse to fight off the gaseous foe, to suppress it as a hideous monster. With a wild
fling of one arm, Thurnig slammed the flapping panel of the Servidor.
But the remedy came too late. The gas tank had delivered its full quota. Enveloped by the yellow cloud,
Thurnig was seized by a frantic desire for air. Clawing as if clutched by a living creature, the man
stumbled toward the window.
Behind him, the gas was dissolving into the air; but that offered no relief. The stuff had done its work;
deep in his lungs, Thurnig could feel its grip. He managed to pry the window upward, to stare downward
into the darkness of the hotel courtyard. Then, his elbows tightened on the sill; slowly, they relaxed.
Thurnig rolled prone upon the floor.
Sounds told that the outer panel of the Servidor was being opened cautiously. There was a muffled
scrape as the gas box was removed; next, a slight thump from the closing outer panel. The evidence was
gone.
SOME minutes later, a valet arrived outside Thurnig's door carrying the expected tuxedo. He inserted the
suit in the Servidor, and knocked. Thurnig did not answer; the valet remained, however, a trifle puzzled.
He expected to hear Thurnig take the tuxedo at once, for the guest had specified that he would be in his
room to receive it by half past eight. The valet knocked again; finally, he opened the outer panel, to note
that the suit was still there. Closing the Servidor, the valet went to the corridor telephone and called the
desk.
He learned that Mr. Thurnig had not been seen in the lobby. He was told to wait where he was. Soon,
two men arrived; one was the hotel detective, the other the house physician.
"Better unlock the door," the doctor told the dick. "Acute indigestion is serious, and Thurnig may have
had an attack."