The history of the detective was one of hard work, crowned at last by a very remarkable success. His opportunity had come, and he had grasped it. The accident of the war and the immense publicity given to his capture of a German secret agent had brought him into fame, and raised him to the heights of his profession. Moreover, the extraordinary histrionic means taken to achieve his purpose, and the picturesqueness of the details, captured that latent love of romance common to all minds. Hardcastle had become a lion; women were foolish about him; he might have made a great match and retired into private life had he desired to do so. At the present time an American heiress ardently wished to wed the man. But he was not fond of women, and only in love with his business. A hard life in the seamy places of the world had made him something of a cynic. He had always appreciated his own singular powers, and consciousness of ability, combined with a steadfast patience and unconquerable devotion to his "art," as he called it, had brought him through twenty years in the police force. He began at the bottom and reached the top. He was the son of a small shopkeeper, and now that his father was dead his mother still ran a little eating-house for her own satisfaction and occupation. Peter Hardcastle was forty. He had already made arrangements to leave Scotland Yard and set up, single-handed, as a private inquiry agent. The mystery of Chadlands would be the last case to occupy him as a Government servant. In a measure he regretted the fact, for the death of Captain Thomas May, concerning which every known particular was now in his possession, attracted him, and he knew the incident had been widely published. It was a popular mystery, and, as a man of business, he well understood the professional value of such sensations to the man who resolves the puzzle. His attitude toward the case appeared at the outset, and Sir Walter, who had been deeply impressed by the opinions of the dead man's father, and even unconsciously influenced by them, now found himself in the presence of a very different intellect. There was nothing in the least superstitious about Peter Hardcastle. He uttered the views of a remorseless realist, and at the outset committed himself to certain definite assumptions. The inhabitants of the manor house were informed that a friend of Sir Walter's had come to visit Chadlands, and they saw nothing to make them doubt it. For Peter was a great actor. He had mixed with all classes, and the detective had the imitative cleverness to adapt himself in speech and attire to every society. He even claimed that he could think with the brains of anybody and adapt his inner mind, as well as his outer shape, to the changing environment of his activities. He appreciated the histrionics that operate out of sight, and would adopt the blank purview of the ignorant, the deeper attitude of the cultured, or the solid posture of that class whose