"And again, in the instance of your finding the mummy case empty, and then a few moments later with an occupant, you know that it was lamplight, that the lamp was half turned down, and that you had no special reason to look hard at the case. It is quite possible that you may have overlooked the creature in the first instance." "No, no; it is out of the question." "And then Lee may have fallen into the river, and Norton been garrotted. It is certainly a formidable indictment that you have against Bellingham; but if you were to place it before a police magistrate, he would simply laugh in your face." "I know he would. That is why I mean to take the matter into my own hands." "Eh?" "Yes; I feel that a public duty rests upon me, and, besides, I must do it for my own safety, unless I choose to allow myself to be hunted by this beast out of the college, and that would be a little too feeble. I have quite made up my mind what I shall do. And first of all, may I use your paper and pens for an hour?" "Most certainly. You will find all that you want upon that side table." Abercrombie Smith sat down before a sheet of foolscap, and for an hour, and then for a second hour his pen travelled swiftly over it. Page after page was finished and tossed aside while his friend leaned back in his arm-chair, looking across at him with patient curiosity. At last, with an exclamation of satisfaction, Smith sprang to his feet, gathered his papers up into order, and laid the last one upon Peterson's desk. "Kindly sign this as a witness," he said. "A witness? Of what?" "Of my signature, and of the date. The date is the most important. Why, Peterson, my life might hang upon it." "My dear Smith, you are talking wildly. Let me beg you to go to bed." "On the contrary, I never spoke so deliberately in my life. And I will promise to go to bed the moment you have signed it." "But what is it?" "It is a statement of all that I have been telling you to-night. I wish you to witness it." "Certainly," said Peterson, signing his name under that of his companion. "There you are! But what is the idea?" "You will kindly retain it, and produce it in case I am arrested." "Arrested? For what?" "For murder. It is quite on the cards. I wish to be ready for every event. There is only one course open to me, and I am determined to take it." "For Heaven's sake, don't do anything rash!" "Believe me, it would be far more rash to adopt any other course. I hope that we won't need to bother you, but it will ease my mind to know that you have this statement of my motives. And now I am ready to take your advice and to go to roost, for I want to be at my best in the morning."