His voice rose.

‘All your life, Sugden, you’ve resented the wrong your father did you. I think you determined long ago to kill him. You come from the next county, not very far away. Doubtless your mother, with the money Simeon Lee so generously gave her, was able to find a husband who would stand father to her child. Easy for you to enter the Middleshire Police Force and wait your opportunity. A police superintendent has a grand opportunity of committing a murder and getting away with it.’

Sugden’s face had gone white as paper. 

He said:

‘You’re mad! I was outside the house when he was killed.’

Poirot shook his head.

‘No, you killed him before you left the house the first time. No one saw him alive after you left. It was all so easy for you. Simeon Lee expected you, yes,but he never sent for you. It wasyou who rang him up and spoke vaguely about an attempt at robbery. You said you would call upon him just before eight that night and would pretend to be collecting for a police charity. Simeon Lee had no suspicions. He did not know you were his son. You came and told him a tale of substituted diamonds. He opened the safe to show you that the real diamonds were safe in his possession. You apologized, came back to the hearth with him and, catching him unawares, you cut his throat, holding your hand over his mouth so that he shouldn’t cry out. Child’s play to a man of your powerful physique.

‘Then you set the scene. You took the diamonds. You piled up tables and chairs, lamps and glasses, and twined a very thin rope or cord which you had brought in coiled round your body, in and out between them. You had with you a bottle of some freshly killed animal’s blood to which you had added a quantity of sodium citrate. You sprinkled this about freely and added more sodium citrate to the pool of blood which flowed from Simeon Lee’s wound. You made up up the fire so that the body should keep its warmth. Then you passed the two ends of the cord out through the narrow slit at the bottom of the window and let them hang down the wall. You left the room and turned the key from the outside. That was vital,since no one must, by any chance, enter that room.

‘Then you went out and hid the diamonds in the stone sink garden. If, sooner or later, they were discovered there, they would only focus suspicion more strongly where you wanted it: on the members of Simeon Lee’s legitimate family. A little before nine-fifteen you returned and, going up to the wall underneath the window, you pulled on the cord. That dislodged the carefully piled-up structure you had arranged. Furniture and china fell with a crash. You pulled on one end of the cord and re-wound it round your body under your coat and waistcoat.

‘You had one further device!’

He turned to the others.

‘Do you remember, all of you, how each of you described the dying scream of Mr Lee in a different way? You, Mr Lee, described it as the cry of a man in mortal agony. Your wife and David Lee both used the expression: a soul in hell. Mrs David Lee, on the contrary, said it was the cry of someone who hadno soul. She said it was inhuman, like a beast. It was Harry Lee who came nearest to the truth. He said it sounded like killing a pig.

‘Do you know those long pink bladders that are sold at fairs with faces painted on them called “Dying Pigs”? As the air rushes out they give forth an inhuman wail. That, Sugden, was your final touch. You arranged one of those in the room. The mouth of it was stopped up with a peg, but that peg was connected to the cord. When you pulled on the cord the peg came out and the pig began to deflate. On top of the falling furniture came the scream of the “Dying Pig”.’

He turned once more to the others.

‘You see now what it was that Pilar Estravados picked up? The superintendent had hoped to get there in time to retrieve that little wisp of rubber before anyone noticed it. However, he took it from Pilar quickly enough in his most official manner. But rememberhe never mentioned that incident to anyone. In itself, that was a singularly suspicious fact. I heard of it from Magdalene Lee and tackled him about it. He was prepared for that eventuality. He had snipped a piece from Mr Lee’s rubber spongebag and produced that, together with a wooden peg. Superficially it answered to the same description-a fragment of rubber and a piece of wood. It meant, as I realized at the time, absolutely nothing! But, fool that I was, I did not at once say; “This means nothing,so it cannot have been there, and Superintendent Sugden is lying…” No, I foolishly went on trying to find an explanation for it. It was not until Mademoiselle Estravados was playing with a balloon that burst, and she cried out that it must have been a burst balloon she picked up in Simeon Lee’s room, that I saw the truth.

‘You see now how everything fits in? The improbable struggle,which is necessary to establish a false time of death; the locked door-so that nobody shall find the body too soon; the dying man’s scream. The crime is now logical and reasonable.

‘But from the moment that Pilar Estravados cried aloud her discovery about the balloon, she was a source of danger to the murderer. And if that remark had been heard by him from the house (which it well might, for her voice was high and clear and the windows were open), she herself was in considerable danger. Already she had given the murderer one very nasty moment. She had said, speaking of old Mr Lee, “He must have been very good-looking when he was young.” And had added, speaking directly to Sugden: “Like you.” She meant that literally, and Sugden knew it. No wonder Sugden went purple in the face and nearly choked. It was so unexpected and so deadly dangerous. He hoped, after that, to fix the guilt on her, but it proved unexpectedly difficult, since, as the old man’s portionless granddaughter, she had obviously no motive for the crime. Later, when he overheard from the house her clear, high voice calling out its remark about the balloon, he decided on desperate measures. He set that booby trap when we were at lunch. Luckily, almost by a miracle, it failed…’

There was dead silence. Then Sugden said quietly:

‘When were you sure?’

Poirot said:

‘I was not quite sure till I brought home a false moustache and tried it on Simeon Lee’s picture. Then-the face that looked at me was yours.’

Sugden said:

‘God rot his soul in hell! I’m glad I did it!’