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leaving me in a featureless, tomb-like cylinder, trapped. I fought a momentary twinge of claustrophobia and waited. Abruptly, without warning or reason, I was weightless! I shoved against the floor and immediately

rebounded toward the ceiling. There was no feeling of motion, but yet I got the eerie impression that I was plunging at great velocity into the depths of the earth. Where was I going? What or who was doing this? Just as abruptly as my weight had left me it returned and I fell to the floor of the cylinder with a thump. Now what?

    “‘The wall glowed again, a burning circle of contained fire formed, and there again was the "door", opening to a corridor about 20 yards long.

    “‘I cautiously stepped out and instantly the door behind me vanished, leaving no trace of its former presence. I was trapped again, far below the surface of the earth in an empty corridor of gleaming metal - or at least it appeared to be metallic in nature. Then the call came to me again. "WELCOME!" it said this time, and then, "COME!"

    “‘I rushed to the end of the mysterious hall and as I did so the wall again glowed and opened.

     “‘I was greeted by the most stunningly beautiful sight I have ever witnessed. I was on a giant glassed-in balcony, looking out over a vast chamber or cavern dozens of miles in length and thousands of feet high, filled with a huge utterly incomprehensible "city". I saw scintillating, translucent towers, monolithic slab-like buildings glowing with intricate patterns and colors, strange ribbon-like structures of glistening materials winding and twisting through the city. I knew at once that this city was never meant for human eyes, for the intense glare from the gigantic ceiling of this world within a world was twice as bright as the noon-day sun on the surface!

     “‘I slowly became accustomed to the brightness and overcame my initial fright at seeing the city. I then