Here was a surprise indeed. Prelice knew that Dr. Horace had worked his way up from a humble position, and laid no claims to being of gentle blood. But he had never referred to the existence of a single relative, and the young man had always believed him to be alone in the world. Now it seemed that Agstone was his brother. And when Prelice recollected that Agstone was the same hirsute, red-haired, uncouth animal in appearance, it flashed across his mind that the brothers were twins. The extraordinary thing was that he had not noted the close resemblance before, since he had seen Agstone dead and Horace alive, within the last few hours. But the idea of connecting a common sailor with an eminent scientific man had never entered his mind. In the cab, on the way to the New Bailey, Horace gruffly gave his companion a few facts to substantiate his statement, but Prelice observed that he said as little as he could. "My full name is Horace Agstone," explained the doctor bluntly, "but as I got on in life and rose in the world I dropped the last and kept to the first. Steve is my elder brother by one year, and we are the sons of a Suffolk labourer. I had the brains of the family, and in one way and another managed to cultivate those same brains, with the result--no very great one--you see. Steve went to sea, and we did not meet for years and years. When he returned to England with old Lanwin he went down to Suffolk to look up the family. Our parents were dead and buried, but Steve learned my name and address from the vicar. He came to look me up, but as we did not hit it off very well, we considered it best to live our lives apart, as formerly. That's all." Prelice threw his cigarette out of the cab, and stared at the horse in a meditative way. "Strange that you should be connected with this case also," he remarked dreamily. The doctor grew red, and looked fierce. "What the devil do you mean by that? I have nothing to do with the case." "Your brother----" "I have nothing to do with my brother. He and I were born of the same mother, but beyond that we are--I mean we were, seeing he is dead--nothing to one another. If he chooses to kill people and be killed, that is his affair. No one can connect Steve Agstone with Dr. Horace, save the vicar of Burfield in Suffolk, unless you betray me. Not that I care, mark you, Prelice. I learned that fable of the old man and his ass very early in life, and never trouble about people and their opinions." "I don't intend to betray you," said Prelice coldly, but flushing all over his freckled face; "you can be brother to Satan for all I care. Moreover, I have given confidence for confidence. If I know about your relation to Agstone, you know about the knife's evidence, which I and Shepworth suppressed."