Alice was frowning at what Jowett had said. ‘But if Peter Brand had dressed up-or, rather, undressed-like this, and left the chair, we should have known as soon as he took his hands away from the brass handles and broke the electrical circuit.’
‘A valid observation, Miss Probert,’ said Jowett, obviously relishing his role as unraveller of the mystery. ‘Won’t you kindly come over here and examine the galvanometer?’
The invitation was to Alice, but she was joined there by everyone else.
‘Damn it, the confounded thing is still registering 196!’ said Probert. ‘There’s something amiss.’
‘There must be somebody else in the chair!’ said Alice. ‘An accomplice! That large policeman with the beard.’
‘No, Miss Probart. You are quite mistaken,’ said Jowett. ‘Come and see for yourself.’ He walked to the curtains and drew them emphatically apart.
There was nobody seated in the chair. Stretched between the handles was a white handkerchief.
‘What’s a blasted wipe doing there?’ demanded Probert.
‘Standing in for Sergeant Cribb, Doctor,’ said Jowett. ‘You wouldn’t think a pocket handkerchief could stretch that far until you held it by opposite corners and saw the length of it. It tucks in nicely where the handle is screwed to the wood.’
‘A handkerchief won’t conduct electricity,’ said Probert.
‘Ah, but a wet one will,’ said Jowett. ‘And this one’s nice and wet from mopping up the water I spilt when I knocked over the flowers. You did a good job there, Cribb, and very naturally as well.’
‘Thank you, sir,’ said Cribb.
‘We take no credit for the idea,’ Jowett went on, having conceded Cribb as much gratification as was good for him. ‘That was Brand’s. And he was clever enough to knock the chrysanthemums over with an orange-unless somebody put out a hand in the dark to assist the operation, and I suppose we’ll never know that for certain. However, he got his handkerchief saturated in a perfectly accountable way, by very decently agreeing to wipe up the water himself. He then replaced it in his pocket and took his place in the chair.’
‘How would he remove the handkerchief from his pocket when he was holding the handles?’ asked Strathmore.
‘That is easier than it might appear. He could not take his hands off the handles without breaking the current, it is true, but that still permitted him a considerable amount of movement with the rest of his body. It would not be difficult to bring the right pocket into a position where the thumb of the right hand could hook out the handkerchief. So long as the palm of that hand remained firmly on the handle he could use the fingers to fasten the end of the handkerchief as you see it here. He then had only to pick up the loose end in his teeth and transfer it to the left hand, and secure it to the handle. The contact would thus be unbroken, and he could leave the chair by passing the upper half of his body under the handkerchief. Sergeant Cribb is not a contortionist, but he seems to have achieved this feat without trouble. Is that so, Sergeant?’
‘Yes, sir.’
‘The rest you have seen for yourselves,’ said Jowett, spreading out his hands.
Nye was frowning. ‘We’ve seen what the poor beggar planned to do, but you haven’t shown us how he was killed.’
‘That’s a different question, Captain, but you shall have the answer if you would oblige me by going downstairs to turn off the electricity again-for the last time, I do assure you. And Cribb, Constable Thackeray is waiting outside the door, I believe. Ask him to step inside, will you?’
‘Dressed like this, sir?’ said Cribb, frowning.
‘If you please. After that you may step behind the curtain and put on your normal clothes. I need Thackeray to take the part of the corpse. He is experienced in the role, you told me.’
‘That’s right, sir. He’s a natural in the part.’ Cribb paused, remembering something. ‘Might I make one small request, sir? I’d like to put my jacket and trousers on again first. I wouldn’t care for Thackeray to see me like this. Not good for discipline.’
‘Really?’ Jowett eyed the nightshirt speculatively. ‘I suppose not. Be quick then. We can’t keep everyone here till midnight, you know.’
‘I trust that it will not distress anybody if I ask the constable to adopt the position in which we found Mr Brand,’ Jowett resumed, after Thackeray had entered, wearing an eye-shade.
There was no dissent, although Captain Nye was staring fixedly at Thackeray, frowning and inclining his head slightly to one side and then to the other. The constable was glad to have a reason to turn his back, sit in the chair, and give his impression of an electrocuted corpse. When he was propped stiffly against the left-hand side, he explained between his teeth, ‘By rights my hair should be standing on end, sir.’
‘This is quite realistic enough for our purposes,’ said Jowett. ‘Now, ladies and gentlemen, I want you to notice most particularly the position of the left hand which is not gripping the handle as one might expect. In electrocution the muscles contract and the hand takes an even stronger grip on anything it is holding. But what has happened here? The left arm dangles over the left arm of the chair. You may relax, Thackeray.’
‘Thank you, sir.’
‘So we asked ourselves why the body should have been in this position,’ Jowett continued.
‘Perhaps the handkerchief had fallen on the floor and he was reaching to pick it up,’ suggested Alice. ‘He could grip the left handle with his teeth to maintain the electrical contact.’
‘That’s clever thinking, Miss Probert,’ said Jowett, ‘but it isn’t quite consistent with the facts. Mr Brand couldn’t have received a shock of four hundred volts by doing what you say.’
‘The only way he’d get a shock like that is by touching the main cable,’ said Probert, ‘but it’s out of reach behind the chair. Anyone can see that.’
‘Quite right, Doctor,’ said Jowett. ‘But let us suppose that instead of the damp handkerchief lying on the floor here, as your daughter suggested, it was here.’ He pointed to the transformer. ‘Let us suppose that one end of it was attached to the positive terminal on the main side of the box. What do you suppose would happen if the medium reached out with his hand to recover the handkerchief-which we have seen was essential to his purpose?’
‘He would die the moment he touched it,’ said Strathmore, ‘but are you really asking us to believe that the handkerchief fell from the chair and somehow landed three feet behind it with one corner attached to the positive terminal?’
‘No, sir,’ said Jowett. ‘It was placed there as a deliberate act.’
‘But that would be murder!’ said Nye.
‘It was.’
‘Wait a moment, gentlemen!’ said Alice. ‘I think you have forgotten something. If this theory is to be believed, we should have found the handkerchief attached to the transformer when we discovered poor Mr Brand in here.’
‘We should indeed,’ agreed Jowett, ‘but it was not there or anywhere in sight. And the interesting thing is that there was no handkerchief among the list of possessions found on Mr Brand’s body. We are quite sure that he had one, because he mopped up the chrysanthemum-water with it. There is only one explanation possible, and that is that it was picked up by one of you-after Mr Brand had been murdered.’
The drift of Jowett’s thesis must have been increasingly obvious, but this conclusion still had the effect of stunning everybody. Miss Crush gasped with such force that it was difficult to tell how many smaller intakes of breath occurred at that precise moment.
Probert was the first to respond. ‘Before anyone begins to make assertions about present company, I think you ought to make it absolutely dear, Inspector, that this is an engaging theory without any basis of evidence. I’m no lawyer, but I know enough about the workings of the courts to point out that the Attorney-General himself couldn’t prove what you’re saying without a witness to the facts. Let’s see if we have one, shall we? I ask you, ladies and gentlemen, did any one of you see a handkerchief attached to the transformer as Inspector Jowett has postulated?’ He looked at each person in turn, with eyebrows speculatively raised. ‘You see? Not one witness. You can’t even produce the confounded handkerchief! It’s like trying to prove a poisoning without the arsenic.’