It seemed then that fairyland had opened its gates to the young man in gray denim. He immediately fell under its influence when they traversed a long lane between rows of brightly colored growing things which filled the air with sweet odors. Feathered creatures fluttered about and twittered and caroled in the sheer joy of being alive. It was sweeter music than he had ever believed possible or even imagined as existing. Again he forgot the menace of the imperial edict which had brought him from the other side of the world. * * * * * Then rudely, he was brought back to earth. He was in the presence of the mighty Zar and his three escorts were bowing themselves from the huge room in which the wizened monarch sat enthroned. They had finished their duties. A shriveled face; beady eyes; trembling hands with abnormally large knuckles; a cruel and determined mouth--these were the features that most impressed Karl as he stared wordlessly at this Zar of the Eastern Hemisphere. The magnificence of the royal robe was lost on the young wearer of the gray. "Well, well, so this is Peter Van Dorn, my beloved nephew." The Zar was speaking and the chilly sarcasm in which the words were uttered belied the friendliness they otherwise might have implied. "That's what I'm told," replied Karl, "though I didn't know I'm supposed to be the nephew of so great a figure as yourself." Not bad that, for an humble wearer of the gray. "Oh, yes, yes, indeed. Why else should I have sent for you?" "I have wondered why--and still wonder." "Oh, you wonder, eh?" The Zar inspected him carefully and then broke into a cackle of horrible laughter. "A Van Dorn in gray denim!" he chortled. "A mole of the Americas! And to think that even the Zar has been unable to find him in all these years!" "Stop!" bellowed Karl. "I'll not have your ridicule. Come to the point now and have it over with. Kill me if you will, but tell me the story!" He had seen the slender tube in the Zar's hand. * * * * * An expression of surprise, almost of admiration, flickered in the beady eyes of the Zar and was gone. He spoke coldly. "Very well, I shall explain. You, Peter, are actually my nephew. Your father, Derek Van Dorn, was my brother; he a king of Belravia and I a poor but experienced scientist. He scorned me and he paid, for I learned of the ancient race of the other side of the Moon, the side we can not see from the earth. I went to them and enlisted their aid in warring upon my brother. When we returned to carry on this war I learned that I had a son. So, too, did Derek. But my son was born in obscurity and Derek's son--you, Peter--in the lap of luxury. The war was short and, to me, sweet. Belravia was first to fall, and I had your father removed from this life by the vibrating death." "You monster!" cried Karl. But the slender rod menaced him.