Arthur went on, hoping in the end to catch sight of Margaret, but he saw no one. In that grey, chilly day the woods, notwithstanding their greenery, were desolate and sad. A sombre mystery seemed to hang over them. At last he came to a stone bench at a cross-way among the trees, and, since it was the only resting-place he had seen, it struck him that Margaret might come there to sit down. He hid himself in the bracken. He had forgotten his watch and did not know how the time passed; he seemed to be there for hours.
But at length his heart gave a great beat against his ribs, for all at once, so silently that he had not heard her approach, Margaret came into view. She sat on the stone bench. For a moment he dared not move in case the sound frightened her. He could not tell how to make his presence known. But it was necessary to do something to attract her attention, and he could only hope that she would not cry out.
'Margaret,' he called softly.
She did not move, and he repeated her name more loudly. But still she made no sign that she had heard. He came forward and stood in front of her.
'Margaret.'
She looked at him quietly. He might have been someone she had never set eyes on, and yet from her composure she might have expected him to be standing there.
'Margaret, don't you know me?'
'What do you want?' she answered placidly.
He was so taken aback that he did not know what to say. She kept gazing at him steadfastly. On a sudden her calmness vanished, and she sprang to her feet.
'Is it you really?' she cried, terribly agitated. 'I thought it was only a shape that mimicked you.'
'Margaret, what do you mean? What has come over you?'
She stretched out her hand and touched him.
'I'm flesh and blood all right,' he said, trying to smile.
She shut her eyes for a moment, as though in an effort to collect herself.
'I've had hallucinations lately,' she muttered. 'I thought it was some trick played upon me.'
Suddenly she shook herself.
'But what are you doing here? You must go. How did you come? Oh, why won't you leave me alone?'
'I've been haunted by a feeling that something horrible was going to happen to you. I was obliged to come.'
'For God's sake, go. You can do me no good. If he finds out you've been here--'
She stopped, and her eyes were dilated with terror. Arthur seized her hands.
'Margaret, I can't go--I can't leave you like this. For Heaven's sake, tell me what is the matter. I'm so dreadfully frightened.'
He was aghast at the difference wrought in her during the two months since he had seen her last. Her colour was gone, and her face had the greyness of the dead. There were strange lines on her forehead, and her eyes had an unnatural glitter. Her youth had suddenly left her. She looked as if she were struck down by mortal illness.
'What is that matter with you?' he asked.
'Nothing.' She looked about her anxiously. 'Oh, why don't you go? How can you be so cruel?'
'I must do something for you,' he insisted.
She shook her head.
'It's too late. Nothing can help me now.' She paused; and when she spoke again it was with a voice so ghastly that it might have come from the lips of a corpse. 'I've found out at last what he's going to do with me He wants me for his great experiment, and the time is growing shorter.'
'What do you mean by saying he wants you?'
'He wants--my life.'
Arthur gave a cry of dismay, but she put up her hand.
'It's no use resisting. It can't do any good--I think I shall be glad when the moment comes. I shall at least cease to suffer.'
'But you must be mad.'
'I don't know. I know that he is.'
'But if your life is in danger, come away for God's sake. After all, you're free. He can't stop you.'
'I should have to go back to him, as I did last time,' she answered, shaking her head. 'I thought I was free then, but gradually I knew that he was calling me. I tried to resist, but I couldn't. I simply had to go to him.'
'But it's awful to think that you are alone with a man who's practically raving mad.'
'I'm safe for today,' she said quietly. 'It can only be done in the very hot weather. If there's no more this year, I shall live till next summer.'
'Oh, Margaret, for God's sake don't talk like that. I love you--I want to have you with me always. Won't you come away with me and let me take care of you? I promise you that no harm shall come to you.'
'You don't love me any more; you're only sorry for me now.'
'It's not true.'
'Oh yes it is. I saw it when we were in the country. Oh, I don't blame you. I'm a different woman from the one you loved. I'm not the Margaret you knew.'
'I can never care for anyone but you.'
She put her hand on his arm.
'If you loved me, I implore you to go. You don't know what you expose me to. And when I'm dead you must marry Susie. She loves you with all her heart, and she deserves your love.'
'Margaret, don't go. Come with me.'
'And take care. He will never forgive you for what you did. If he can, he will kill you.'
She started violently, as though she heard a sound. Her face was convulsed with sudden fear.
'For God's sake go, go!'
She turned from him quickly, and, before he could prevent her, had vanished. With heavy heart he plunged again into the bracken.
When Arthur had given his friends some account of this meeting, he stopped and looked at Dr Porhoлt. The doctor went thoughtfully to his bookcase.
'What is it you want me to tell you?' he asked.
'I think the man is mad,' said Arthur. 'I found out at what asylum his mother was, and by good luck was able to see the superintendent on my way through London. He told me that he had grave doubts about Haddo's sanity, but it was impossible at present to take any steps. I came straight here because I wanted your advice. Granting that the man is out of his mind, is it possible that he may be trying some experiment that entails a sacrifice of human life?'
'Nothing is more probable,' said Dr Porhoлt gravely.
Susie shuddered. She remembered the rumour that had reached her ears in Monte Carlo.
'They said there that he was attempting to make living creatures by a magical operation.' She glanced at the doctor, but spoke to Arthur. 'Just before you came in, our friend was talking of that book of Paracelsus in which he speaks of feeding the monsters he has made on human blood.'
Arthur gave a horrified cry.
'The most significant thing to my mind is that fact about Margaret which we are certain of,' said Dr Porhoлt. 'All works that deal with the Black Arts are unanimous upon the supreme efficacy of the virginal condition.'
'But what is to be done?' asked Arthur is desperation. 'We can't leave her in the hands of a raving madman.' He turned on a sudden deathly white. 'For all we know she may be dead now.'
'Have you ever heard of Gilles de Rais?' said Dr Porhoлt, continuing his reflections. 'That is the classic instance of human sacrifice. I know the country in which he lived; and the peasants to this day dare not pass at night in the neighbourhood of the ruined castle which was the scene of his horrible crimes.'
'It's awful to know that this dreadful danger hangs over her, and to be able to do nothing.'
'We can only wait,' said Dr Porhoлt.
'And if we wait too long, we may be faced by a terrible catastrophe.'
'Fortunately we live in a civilized age. Haddo has a great care of his neck. I hope we are frightened unduly.'