"Dan – go to the sanitarium and kill it. Exterminate it. It isn't Edward Derby any more. She got me – it's Asenath – and she has been dead three months and a half. I lied when I said she had gone away. I killed her. I had to. It was sudden, but we were alone and I was in my right body. I saw a candlestick and smashed her head in. She would have got me for good at Hallowmass.
"I buried her in the farther cellar storeroom under some old boxes and cleaned up all the traces. The servants suspected next morning, but they have such secrets that they dare not tell the police. I sent them off, but God knows what they – and others of the cult – will do.
"I thought for a while I was all right, and then I felt the tugging at my brain. I knew what it was – I ought to have remembered. A soul like hers – or Ephraim's – is half detached, and keeps right on after death as long as the body lasts. She was getting me – making me change bodies with her-seizing my body and purting me in that corpse of hers buried in the cellar.
"I knew what was coming – that's why I snapped and had to go to the asylum. Then it came – I found myself choked in the dark – in Asenath's rotting carcass down there in the cellar under the boxes where I put it. And I knew she must be in my body at the sanitarium – permanently, for it was after Hallowmass, and the sacrifice would work even without her being there – sane, and ready for release as a menace to the world. I was desperate, and in spite of everything I clawed my way out.
"I'm too far gone to talk – I couldn't manage to telephone – but I can still write. I'll get fixed up somehow and bring this last word and warning. Kill that fiend if you value the peace and comfort of the world. See that it is cremated. If you don't, it will live on and on, body to body forever, and I can't tell you what it will do. Keep clear of black magic, Dan, it's the devil's business. Goodbye – you've been a great friend. Tell the police whatever they'll believe – and I'm damnably sorry to drag all this on you. I'll be at peace before long – this thing won't hold together much more. Hope you can read this. And kill that thing – kill it.
Yours – Ed."
It was only afterward that I read the last half of this paper, for I had fainted at the end of the third paragraph. I fainted again when I saw and smelled what cluttered up the threshold where the warm air had struck it. The messenger would not move or have consciousness any more.
The butler, tougher-fibred than I, did not faint at what met him in the hall in the morning. Instead, he telephoned the police. When they came I had been taken upstairs to bed, but the – other mass – lay where it had collapsed in the night. The men put handkerchiefs to their noses.
What they finally found inside Edward's oddly-assorted clothes was mostly liquescent horror. There were bones, to – and a crushed-in skull. Some dental work positively identified the skull as Asenath's.