That one or other, or both, were guilty of Kitely's murder, and possibly of Stoner's, Brereton was by that time absolutely certain. And realizing that certainty, he felt himself placed in a predicament which could not fail to be painful. It was his duty, as counsel for an innocent man, to press to the full his inquiries into the conduct of men whom he believed to be guilty. In this he was faced with an unpleasant situation. He cared nothing about Mallalieu. If Mallalieu was a guilty man, let Mallalieu pay the richly-deserved consequences of his misdeeds. Brereton, without being indifferent or vindictive or callous, knew that it would not give him one extra heart-throb if he heard Mallalieu found guilty and sentenced to the gallows. But Cotherstone was the father of the girl to whom Windle Bent was shortly to be married--and Bent and Brereton had been close friends ever since they first went to school together. It was a sad situation, an unpleasant thing to face. He had come on a visit to Bent, he had prolonged that visit in order to defend a man whom he firmly believed to be as innocent as a child--and now he was to bring disgrace and shame on a family with whom his host and friend was soon to be allied by the closest of ties. But--better that than that an innocent man should suffer! And walking up and down Bent's smoking-room, and thinking the whole thing through and through, he half made up his mind to tell Bent all about it when he returned. Brereton presently put on hat and coat and left the house. It was then half-past seven; a sharp, frosty November evening, with an almost full moon rising in a clear, star-sprinkled sky. The sudden change from the warmth of the house to the frost-laden atmosphere of the hillside quickened his mental faculties; he lighted his pipe, and resolved to take a brisk walk along the road which led out of Highmarket and to occupy himself with another review of the situation. A walk in the country by day or night and in solitude had always had attractions for Brereton and he set out on this with zest. But he had not gone a hundred yards in the direction of the moors when Avice Harborough came out of the gate of Northrop's garden and met him. "I was coming to see you," she said quietly. "I have heard something that I thought you ought to hear, too--at once." "Yes?" responded Brereton. Avice drew an envelope from her muff and gave it to him. "A boy brought that to me half an hour ago," she said. "It is from an old woman, Mrs. Hamthwaite, who lives in a very lonely place on the moors up above Hobwick Quarry. Can you read it in this light?"