[Transcriber Note: This etext was produced from Amazing Stories October 1948. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] Jan ran tirelessly, his long clean limbs carrying him at express train speed across the uneven terrain. The small deer was beginning to show evidences of tiring. Its foam-flecked mouth was open, the swollen tongue protruding over the teeth. The ten or more miles of the chase had proven Jan's superior strength. The

With a frown of uneasiness he dismissed the ruins of the city and the bridge and turned to the mysteriously glowing square once more. The deer had vanished over it. Therefore it must have something to do with the vanishing of the deer. Since he had chased the deer so far, it would be foolish to turn away without investigating. The deer might still be there somewhere. Jan's face lit up with an idea. He looked around until he spied a rock about as big as a fist. He came back with it and stood thou