Cheered somewhat by the view he took, Mrs. Jenner told him all she knew with full details. Two points struck Mr. Heron--one that the window had been open and that Mrs. Jenner had left her husband standing near it; the other that he had had in his possession a red pocket-book which had afterwards disappeared. Beyond this he gathered that her account of the boasts her husband had made on that night that he had had somebody in his power, somebody from whom he intended to extort money. "And I quite believe that is true," finished the unhappy woman, bitterly. "He had the instincts of a blackmailer." "Well, said Geoffrey, preparing to take his departure. I think the motive for the crime will be found in that pocket-book. Whoever took it murdered your husband. The window was open, the book, as you say, on the table, and near the window your husband was standing. Also," he added with emphasis, "you say the knife was lying beside the pocket-book. Now, if your son had used it he would have had to pass his father to get it and so would have put him on his guard, even if he had not been prevented from taking it. No, Mrs. Jenner, your son is innocent, as innocent as yourself. The assassin seized that knife through the open window and struck the blow in order to get possession of that pocket-book, which contained--of that I am sure--some document which would have been used as a lever to extort money. That is my theory, and I will make it my business to prove that it is the right one. Meanwhile, I must nurse Neil." "You are a good man," said Mrs. Jenner shewing emotion for the first time, "and what you say seems feasible enough. Go, and do the best you can. Heaven will reward you. But my son, my darling boy--he may die!" "Not if I can help it. I'll pull him round somehow. Keep up your spirits. You have had a long night, but I believe the dawn is at hand." "Heaven bless you!" she said. Then Geoffrey took his leave, to return to the bedside of Neil Webster.