What might have happened, but for a timely interruption, may only be surmised; but that the trainer would have received a severe mauling, if nothing more, was clearly indicated by the attitudes of the two who faced him.
It was a pale-faced man who rushed into the Greystoke library to announce that he had found Jack's door locked and had been able to obtain no response to his repeated knocking and calling other than a strange tapping and the sound of what might have been a body moving about upon the floor.
Four steps at a time John Clayton took the stairs that led to the floor above. His wife and the servant hurried after him. Once he called his son's name in a loud voice; but receiving no reply he launched his great weight, backed by all the undiminished power of his giant muscles, against the heavy door. With a snapping of iron butts and a splintering of wood the obstacle burst inward.
At its foot lay the body of the unconscious Mr. Moore, across whom it fell with a resounding thud. Through the opening leaped Tarzan, and a moment later the room was flooded with light from a dozen electric bulbs.
It was several minutes before the tutor was discovered, so completely had the door covered him; but finally he was dragged forth, his gag and bonds cut away, and a liberal application of cold water had hastened returning consciousness.
"Where is Jack?" was John Clayton's first ques-
