Only Dr. Willett, who brought Charles Ward into the world and watched his growth of body and mind ever since, seemed frightened at the thought of his future freedom. He had had a terrible experience and had made a terrible discovery which he dared not reveal to his skeptical colleagues. Willett, indeed, presents a minor mystery all his own in his connection with the case. He was the last to see the patient before his flight, and emerged from that final conversation in a state of mixed horror and relief which several recalled when Ward’s escape became known three hours later. That escape itself is one of the unsolved wonders of Dr. Waite’s hospital. A window open above a sheer drop of sixty feet could hardly explain it, yet after that talk with Willett the youth was undeniably gone.