The man had taken a step or two across the glass roof before he noticed the presence of the strangers; but then he stopped abruptly. There was no expression of either fear or surprise upon his tranquil face, yet he must have been both astonished and afraid; for after his eyes had rested upon the ungainly form of the horse for a moment he walked rapidly to the furthest edge of the roof, his head turned back over his shoulder to gaze at the strange animal.

“Look out!” cried Dorothy, who noticed that the beautiful man did not look where he was going; “be careful, or you’ll fall off!”

But he paid no attention to her warning. He reached the edge of the tall roof, stepped one foot out into the air, and walked into space as calmly as if he were on firm ground.

The girl, greatly astonished, ran to lean over the edge of the roof, and saw the man walking rapidly through the air toward the ground. Soon he reached the street and disappeared through a glass doorway into one of the glass buildings.