"When I am gone," he whispered; "when I have passed away. Then you shall find them and read the translation I have made. And then, too, in your turn, you must try, with the latest resources of science at your disposal to aid you, to compass their utter destruction." He paused a moment, and his face grew pale as the face of a corpse. "Until that time," he added presently, without looking up, "I must ask you not to refer to the subject again--and to keep my confidence meanwhile--_ab--so--lute--ly_." 3 A year passed slowly by, and at the end of it Dr. Laidlaw had found it necessary to sever his working connexion with his friend and one-time leader. Professor Ebor was no longer the same man. The light had gone out of his life; the laboratory was closed; he no longer put pen to paper or applied his mind to a single problem. In the short space of a few months he had passed from a hale and hearty man of late middle life to the condition of old age--a man collapsed and on the edge of dissolution. Death, it was plain, lay waiting for him in the shadows of any day--and he knew it. To describe faithfully the nature of this profound alteration in his character and temperament is not easy, but Dr. Laidlaw summed it up to himself in three words: _Loss of Hope_. The splendid mental powers remained indeed undimmed, but the incentive to use them--to use them for the help of others--had gone. The character still held to its fine and unselfish habits of years, but the far goal to which they had been the leading strings had faded away. The desire for knowledge--knowledge for its own sake--had died, and the passionate hope which hitherto had animated with tireless energy the heart and brain of this splendidly equipped intellect had suffered total eclipse. The central fires had gone out. Nothing was worth doing, thinking, working for. There _was_ nothing to work for any longer! The professor's first step was to recall as many of his books as possible; his second to close his laboratory and stop all research. He gave no explanation, he invited no questions. His whole personality crumbled away, so to speak, till his daily life became a mere mechanical process of clothing the body, feeding the body, keeping it in good health so as to avoid physical discomfort, and, above all, doing nothing that could interfere with sleep. The professor did everything he could to lengthen the hours of sleep, and therefore of forgetfulness.