"As surely as we are in the same room together, through you. Receive what I am about to say as the fixed resolve of a man who sees before him a stern duty and will not flinch from it. Having come into association with you, I am determined not to lose sight of you. I put aside any further consideration of a strange and inexplicable mystery in connection with yourself as being utterly and entirely beyond my power to understand." "My dear sir," said Devlin, with a glance at his shabby clothes, "you flatter me." "All my energies now are bent to one purpose, which, through you, I shall carry to its certain end. You have made yourself plain to me. I hope up to this point I have made myself plain to you." "You are the soul of lucidity," said Devlin, "but much remains yet to explain. For the sake of argument we have admitted an element of romance into this very prosaic matter; for it is really prosaic, almost commonplace. Life is largely made up of tragedies and mysteries, the majority of them petty and contemptible, a few only deserving to be called grand. As a matter of fact, my dear sir, existence, with all its worries, anxieties, hopes, and disappointments, is nothing better than a game of pins and needles. It is the littleness of human nature that magnifies a pin prick into a wound of serious importance. To think that some of these mortals should call themselves philosophers! It is laughable. Do you follow me?" "Not entirely," I replied, "but I have some small glimmering of your meaning." "Were your mind," said Devlin, shaking with internal laughter, "quite free from the influence of that thousand pounds, it would be clearer. In the grand Scheme of Nature, so far as mortals comprehend it, the potent screw is human selfishness. These speculations, however, are perhaps foreign to the point. Let us continue our amicable argument until we thoroughly understand each other upon the subject of this murder. You see, my dear sir, I wish to know exactly how I stand; for despite the extraordinary opinion you have formed of me, it is you who have assumed the _rôle_ of Controller of Destinies. I am but a mere instrument in your hands." He measured me with his eyes. "You are well built, and are, I should judge, a powerful man." "You are contemplating the probability of a physical struggle between us," I said. "Dismiss it; there will be none." He made me a mocking bow. "My mind is, indeed, relieved. You do not intend violence, then. I am free to leave the house if I wish--at this moment, if I please. Have you taken that contingency into account?" "I have." "You will not attempt to detain me by force?" "No." "In such an event, how will you act?" "I shall follow you, and to the first policeman I meet I shall say, 'Arrest that person. He is implicated in the murder of Lizzie Melladew.'" Devlin cast upon me a look of admiration. "That would be awkward," he said. "Decidedly awkward--for you." "You would be asked to furnish evidence."