Years before Mary Bolitho had admired the words of Lovelace, the poet:
"Stone walls do not a prison make, or iron bars a cage."
But now the lines seemed poverty itself. How little it expressed the deep feeling of her life. They were not in prison. The solemn bell of doom was not tolling. She was in heaven. So great is the power of a pure love. As for Paul, at that moment everything faded but the blissful present. There was no past, there was no future. Nothing mattered but the now. He had entered into the joy of which he dreamt, and he would not think of anything else. How long they remained in that condition of untold happiness he did not know, he did not care. But presently all the grim realities came back again. He knew where he was. Mary would shortly have to leave him. He thought of the warder peering curiously into her face and making surmises as to why she came. He thought of whispering tongues; but more than all that, he thought of the terrible future which awaited him. Paul's temptation had not yet come, but the hand of the tempter was even at that moment knocking at the door of his heart.
"Now, Paul," she said, and her voice was changed, "now we must think about the future."
"Not yet, not yet, Mary. Let me remain in heaven while I can. Hell will come soon enough."
"No, Paul, you must think about the future. You must think about it at once. You are not guilty of this, and you must know who is. You must tell me. Hitherto you have refused to confide in anyone. You have maintained a silence which has been misunderstood, and which has caused so many to think of you as guilty. It must be broken, Paul. You must tell me everything, and I will save you."
It was then that he realised what he had to face. For Paul Stepaside believed that he knew who had killed Wilson. For many a weary hour he had thought over his mother's strange behaviour, thought of the flash of madness which had shot from her eyes, thought of the wild words she had uttered. He remembered, too, the sight that met his gaze on the morning of the murder. He saw her again, sitting in her bedroom, saw the look of unholy joy in her face; and in his heart of hearts he felt sure of what she had done. It was all for him. She had loved him with a mad, unreasoning frenzy; for him she was willing to sacrifice her own life. How much wonder, then, that she had been willing to sacrifice another's life. She had believed that Ned Wilson stood between him and happiness, and she had determined to move him out of life's pathway. He had seen her on the day before the murder, with the knife which had killed Ned Wilson in her hand. She, unknown to his partner, George Preston, had come to his office. He had seen her handling this murderous weapon, and he remembered the look in her eyes; remembered, too, what she had said. How could he doubt? Indeed, she had practically confessed the deed to him, and he had sworn that not a shadow of suspicion should rest upon her name. She was his mother. She had suffered for him. She had committed a crime for him. But he could not let her pay the penalty for it. No, no; he was willing to die himself, but he could not bear the thought of his mother's name being tarnished. He shuddered at the very suggestion of her being held up before the world's gaze.