well to what I shall say to you." Moosko was inspecting the room with a gloating smile on his thick lips. "We shall leave you here alone presently," continued Sov. "If you can escape from this building your life will be spared.

"As you see, there are seven doors leading from this room; none of them has bolt or bar. Beyond each is a corridor identical to that through which we just approached the chamber. You are free to open any of the doors and enter any of these corridors. After you pass through a door, a spring will close it; and you cannot open it again from the opposite side, the doors being so constructed that from the corridor there is nothing to lay hold upon wherewith to open them, with the exception of the secret mechanism of that one which let us into the room; through that one door lies life; beyond the others, death.

"In the corridor of the second door you will step upon a hidden spring that will cause long, sharp spikes to be released upon you from all directions; and upon these you will be impaled and die.

"In the third corridor a similar spring will ignite a gas that will consume you in flames. In the fourth, r-rays will be loosed upon you, and you will die instantly. In the fifth, another door will open at the far end and admit a tharban."

"What is a tharban?" I asked.

Sov looked at me in astonishment. "You know as well as I," he growled.

"I have told you that I am from another world," I snapped. "I do not know what the word means."

"It will do no harm to tell him," suggested Vilor; "for if, by chance, he does not know, some of the horror of the room of the seven doors may be lost upon him."

"Not a bad thought," interjected Moosko. "Describe the tharban, Friend Sov."

"It is a terrible beast," explained Sov, "a huge and terrible beast. It is covered with stiff hair, like bristles, and is of a reddish color with white stripes running lengthwise of its body, its belly being of a bluish tinge. It has great jaws and terrible talons, and it eats naught but flesh."

At that instant a terrific roar that seemed to shake the building broke upon our ears.

"That is the tharban," said Hokal with a grin. "He has not eaten for three days, and he is not 

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