`But before that. Consider the difficulty of my position. I began to see that, if I asked him outright, this — ah — this, lunatic might make all sorts of trouble. He would probably refuse, and question my rights. My rights could be proved; but it would mean delay and, all sorts of unpleasantness. He might maintain he, had lost the manuscript, and that would be worse.'

Mr Arbor's aura conveyed an acute spasm of anguish at this thought. General Mason coughed, and Dr Fell contrived to twist his moustache with a hand that hid his mouth.

`And at this juncture,' continued the other, `everything blew up. The manuscript was stolen. And I, you notice, I was the loser.

`Now, gentlemen.' He sat back and gazed about, fixing the eye of each in turn. `Now you will understand why I have gone into such thorough explanations, and why I wish to establish the ownership of that manuscript. Bitton undoubtedly thinks I stole it. I am not particularly concerned with what he thinks; but I cannot have the police thinking so.’

`I was away over the week-end during which the manuscript was stolen, and I arrived back only this morning. I was visiting Mr and Mrs Spengler, some friends of mine who live close to that cottage of my own I mentioned, at Golders Green. "Ah," says the cunning Bitton; "an alibi." And he has the impudence to telephone them in order to confirm it. "Ah," he says then; "it was done by somebody in his employ."

`Now, all this might be at least remotely possible in Bitton's wild imagination. But why, in the name of Heaven, should I go to all the trouble of stealing a manuscript which was already mine?'

There was a silence. Hadley, who had perched himself on the edge of the desk, nodded.

`I suppose, Mr Arbor,' he said, `you are prepared to prove this claim of yours?'

`Naturally. An agreement between Mr McCartney and myself was drawn up by my lawyer in New York and duly attested. A copy of this agreement is now filed with my solicitors in London.'

Hadley lifted his shoulders. `In that case, Mr Arbor, there is nothing more to, be said. Sir William simply took a chance that his discovery would go unnoted.' Hadley spoke coldly and levelly. `Even if you had abstracted the manuscript, to avoid trouble at Sir William's hands, the law could do nothing.’