I was silent for a minute or two. Then I made up my mind what to say. Roger Ackroyd was not Caroline.
‘I’ll tell you the truth,’ I said. ‘At the time I had no suspicion whatever, but since – well, it was mere idle talk on my sister’s part that first put the idea into my head. Since then I haven’t been able to get it out again. But, mind you, I’ve no foundation whatever for that suspicion.’
‘He was poisoned,’ said Ackroyd.
He spoke in a dull heavy voice.
‘Who by?’ I asked sharply.
‘His wife.’
‘How do you know that?’
‘She told me so herself.’
‘When?’
‘Yesterday! My god! Yesterday! It seems ten years ago.’
I waited a minute, then he went on.
‘You understand, Sheppard, I’m telling you this in confidence. It’s to go no further. I want your advice – I can’t carry the whole weight by myself. As I said just now, I don’t know what to do.’
‘Can you tell me the whole story?’ I said. ‘I’m still in the dark. How did Mrs Ferrars come to make this confession to you?’
‘It’s like this. Three months ago I asked Mrs Ferrars to marry me. She refused. I asked her again and she consented, but she refused to allow me to make the engagement public until her year of mourning was up. Yesterday I called upon her, pointed out that a year and three weeks had now elapsed since her husband’s death, and that there could be no further objection to making the engagement public property. I had noticed that she had been very strange in her manner for some days. Now, suddenly, without the least warning, she broke down completely. She – she told me everything. Her hatred of her brute of a husband, her growing love for me, and the – the dreadful means she had taken. Poison! My god! It was murder in cold blood.’
I saw the repulsion, the horror, in Ackroyd’s face. So Mrs Ferrars must have seen it. Ackroyd’s is not the type of the great lover who can forgive all for love’s sake. He is fundamentally a good citizen. All that was sound and wholesome and law-abiding in him must have turned from her utterly in that moment of revelation.
‘Yes,’ he went on, in a low, monotonous voice, ‘she confessed everything. It seems that there is one person who has known all along – who has been blackmailing her for huge sums. It was the strain of that that drove her nearly mad.’
‘Who was the man?’