`Undoubtedly, General. But I had nothing to hold over her; and, above all, she's much more valuable on the string. I think we'll find there is nothing against her at present at the Yard. And I'm almost sure we'll find she's a private detective.'
'Ha!' muttered the General. He twisted his moustache. 'A private detective. But why?'
`There are any number of indications. Clearly she has nothing to fear from the police; she challenged that with every word. She lives in Tavistock Square. The neighbourhood isn't "flash" enough for her if she had that much money of her own to spend, and it isn't cheap enough if she had less. I know the type. She has lived there only a few weeks… just opposite Driscoll. She obviously had paid a great deal of attention to his visitors. She told us only one incident, the visit of his cousin Sheila, because that wouldn't help us; but you notice she had all the details.
`Then did you see her fumbling at her cuff? She hasn't been in the business long; she was afraid it would show out of the arm of her coat, and she was afraid to take it off over in the Warders' Hall, for fear of looking suspicious.'
`Her cuff?'
Hadley nodded. `These private snoopers who get material for divorces. They have to make notes of times and places quickly, and often in the dark. Oh yes. That's what she's up to. She was following somebody this afternoon.'
The General said, `Hum!' He scuffled his feet a moment before asking, 'Something to do with Driscoll?'
Hadley put his head down in his hands.
`Yes. You saw the start she couldn't help giving when she saw that note on my desk. She wasn’t close enough to have read it, but the colour of the paper was enough to identify it.. if she's ever seen any similar notes in connexion with Driscoll. H'm, yes. But that's not the point. I strongly suspect that the person she was actually shadowing this afternoon was… whom do you say, Doctor?'
Dr Fell relighted his pipe. `Mrs Bitton, of course. I'm afraid she rather gave herself away, if you listened to what she said.'
But, good God!' muttered the General. `You mean to say there's something between Driscoll and.. H'm. Yes. It fits, I suppose. But where's your proof?'
`I haven't any proof. As I say, it's only a suspicion.' Hadley rubbed his chin, 'Still, let's take it as a hypothesis for the moment, and work back. Let's assume Larkin was shadowing Mrs Bitton…. Now, this White Tower, General. That's the biggest and most important one isn't it? And it's some distance away from the Bloody Tower, isn't it?'
`Well, yes… it stands alone; it's in the middle of the inner ballium walls just beside the parade-ground.'
`And the tower where the Crown jewels are kept is directly beside the Bloody Tower?'
`The Wakefield Tower. Yes. Wait a minute!' said Mason, excitedly. `I've got it. Mrs Bitton went to see the Crown Jewels. So did Larkin. Mrs Bitton said she wandered up through the arch of the Bloody Tower; and up to the parade-ground…. Larkin' went to the Bloody Tower. She couldn't keep too close to Mrs Bitton. And if she went up the stairs of the Bloody Tower to Raleigh's Walk, she could have seen from a height where Mrs Bitton was going.'
`That's what I wanted to ask you,' said Hadley, knocking his fists against his temples. `She couldn't have seen very far in the mist, of course. It's more probable she did that — if she did — to keep up the illusion of being a tourist. Or she might, have thought Mrs Bitton had gone into the Bloody Tower. It's all supposition. But neither of them went to the White Tower, you see…. Those may be coincidences, but when you couple them with the presence of those two women here, and the statements of Mrs Bitton and Larkin, they sound pretty plausible indications.'
`You're assuming,' said the General, pointing to the table, `that Mrs Bitton wrote that note?' -
`And all the time,' Hadley mused, `suspecting she was being watched, see what the note says: "Be careful. Suspect. Vital." The letter was posted at ten-thirty last night in Mrs Bitton' s district, after Driscoll had paid a short visit that evening. Mrs Bitton had just come back from a walking tour of Cornwall…, and why, in God's name, a walking tour in Cornwall in the worst part of March, unless somebody wanted to get her away from a dangerous infatuation?’
'I'm running on, I suppose. Still, if we assume all this, we must assume it was a dangerous infatuation. For here's a private detective who has been planted in a flat opposite Driscoll for some weeks, even during the time she and her husband were away!… Does that mean anything? And who planted her there? Offhand, of course, the husband.!
'But the name, "Mary"?' suggested General Mason.
`I've heard many more hilariously funny nicknames whatd'yecallem pet names… in my time,' Hadley said, grimly. 'And the handwriting's undoubtedly disguised. Even if it were stolen, it couldn't be used as evidence against her. She's a clever woman.
`Do you see the deep waters we're in now? Come along, Mr Rampole,' he prompted, turning so suddenly that the American jumped; `do you see how it mixes everything up?'
Rampole hesitated. `I can see plenty of difficulties,' he returned. `That letter would have been delivered fairly early this morning. Now we've been assuming all along that the reason why Driscoll telephoned Mr Dalrye had something to do with the hat-thief and his pursuit of the hat-thief. But Driscoll never actually said it did. Dalrye asked him jokingly, if I remember it right, whether he was afraid of his hat being stolen. But all Driscoll actually answered was, "It's not my hat I'm afraid of; it's my head." Dalrye thought it referred to the hat affair; but did it?'
He looked bewilderedly at the chief inspector.
`I don't know,' snapped Hadley. `But he makes that appointment with Dalrye for one o'clock. The appointment in the letter is for one-thirty. He has received the letter that morning; it's scared him, and he wants Dalrye's help. Then some other person sends Dalrye on a wild-goose chase to Driscoll's flat. Driscoll arrived here, in a bad state. He is seen by Parker looking out o f the window, and later somebody touches him on the arm by Traitors' Gate.
`What went on in the merry-go-round composed of Driscoll, Mrs Bitton, Larkin, and a possible fourth party? Was it some sort of crime passionel? And if it was, can anybody on this' side of sanity inform me why Driscoll's body should be found wearing Sir William's stolen top-hat? It's the hat thief angle that's mad and impossible.'
There was a pause. Dr Fell took!he pipe out of his mouth and spoke rather plaintively.
'I say, Hadley,' he remonstrated. 'You're working yourself up into a lather. Be calm, It'll come out all right. Just keep on in your normal course.'
The chief inspector regarded him bitterly.
`Unless our questioning of the other visitors turns up. something,' he said, `we have only one other person to interview. And thank God. I need a brandy. Several brandies. But for the next few minutes, Doctor, you are going to be the chief inspector. With the next witness it becomes your case. In other words, you are going to examine Julius Arbor.?
'With pleasure,' said the doctor, `if you'll give me your chair.' He hauled himself to his feet as Hadley summoned the warder on guard and gave instructions. `It's what I should have asked to do, in any case, Hadley. Because why? Because a good part of the case depends on it. And that side of the case — shall I tell you what that side of the case hinges on, Hadley?'
`You will, anyhow. Well?'
`It hinges on a stolen manuscript,' said Dr Fell.
8. Mr Arbor's Aura
Dr Fell hung his cloak over the back of the chair: Then he squeezed himself into the chair and arranged his various ridges of stomach.
'I don't know whether I ought to let you do this,' said, Hadley. 'I don't want the, General to think we're both mad. And for the love of God try to control your deplorable sense of humour. This is serious business.' He massaged his chin uncomfortably. 'You see, General, in his own way Doctor Fell is invaluable. But he gets his ideas of police procedure from the cinema, and he is under the impression that he can act any sort of part. Whenever I let him question anybody in my presence he tries to give an imitation of me. The result sounds like a schoolmaster with homicidal mania trying to find out what fourth-former spread the axle grease on the, stairs when the headmaster was coming down to dinner