“You see we make a pair. I am you, and you are me. How strange you should not have known me when first we met. How strange you should not have known your own voice when first you heard it, echoing, in the train.” I knew it now – I knew my own voice as it proceeded from his lips. Then I understood how it was that its exceeding familiarity had seemed to fill me with such a sense of bitter pain. “I have been sent in order that you may be able to see just what sort of man you are. I am the power which has been given you to enable you to see yourself as others see you. I will be with you to the end – a mirror ever ready to your hand.” He stopped, and he whispered in my ear; and he smiled a devil’s smile. “You know, it was murder. There was nothing gallant in the deed. It was the act of a co

