‘ “She would be,” I said. “They would start by being quite like mushrooms in appearance, and they would end by being orange with purple spots. There is nothing that class cannot remember if it tries.”

‘I gathered that Denman had been past speech when the doctor got to him. He was incapable of swallowing, and had died within a few minutes. The doctor seemed perfectly satisfied with the certificate he had given. But how much of that was obstinacy and how much of it was genuine belief I could not be sure.

‘I went straight home and asked Mabel quite frankly why she had bought arsenic.

‘ “You must have had some idea in your mind,” I pointed out.

‘Mabel burst into tears. “I wanted to make away with myself,” she moaned. “I was too unhappy. I thought I would end it all.”

‘ “Have you the arsenic still?” I asked.

‘ “No, I threw it away.”

‘I sat there turning things over and over in my mind.

‘ “What happened when he was taken ill? Did he call you?”

‘ “No.” She shook her head. “He rang the bell violently. He must have rung several times. At last Dorothy, the house-parlourmaid, heard it, and she waked the cook up, and they came down. When Dorothy saw him she was frightened. He was rambling and delirious. She left the cook with him and came rushing to me. I got up and went to him. Of course I saw at once he was dreadfully ill. Unfortunately Brewster, who looks after old Mr Denman, was away for the night, so there was no one who knew what to do. I sent Dorothy off for the doctor, and cook and I stayed with him, but after a few minutes I couldn’t bear it any longer; it was too dreadful. I ran away back to my room and locked the door.”

‘ “Very selfish and unkind of you,” I said; “and no doubt that conduct of yours has done nothing to help you since, you may be sure of that. Cook will have repeated it everywhere. Well, well, this is a bad business.”

‘Next I spoke to the servants. The cook wanted to tell me about the mushrooms, but I stopped her. I was tired of these mushrooms. Instead, I questioned both of them very closely about their master’s condition on that night. They both agreed that he seemed to be in great agony, that he was unable to swallow, and he could only speak in a strangled voice, and when he did speak it was only rambling—nothing sensible.

‘ “What did he say when he was rambling?” I asked curiously.

‘ “Something about some fish, wasn’t it?” turning to the other.

‘Dorothy agreed.

‘ “A heap of fish,” she said; “some nonsense like that. I could see at once he wasn’t in his right mind, poor gentleman.”

‘There didn’t seem to be any sense to be made out of that. As a last resource I went up to see Brewster, who was a gaunt, middle-aged woman of about fifty.