No doubt existed in his mind that Simon had happened upon the track of the veritable living Ravengar. It could not be a coincidence that a man so strongly resembling Ravengar, a man posing as a doctor, and buying nearly a sovereign's worth of chloroform, should be occupying rooms in the same house as Camilla. The tremendous revelation of Ravengar's genius for stratagem and intrigue afforded by the recital of the two brothers came upon Hugo with a dazing shock. This man, whom he knew from Camilla's own story to be curiously deficient in ordinary human sentiments, had arranged a sham suicide for the benefit of the general public. He had let Hugo into the secret of that deception, but only to cheat him with another deception, and a more monstrous one. The brain that could conceive the fiction of suicide in the vault--a fiction which, while lulling Hugo into a false security as regards Camilla's safety, at the same time poisoned his happiness--such a brain might be capable of unimagined horrors. Sane or mad, the mere existence of that brain was a menace before which Hugo trembled. He realized that Ravengar had been consummately acting during the latter part of their interview on the first day of the sale, and again consummately acting when he spoke to Hugo on the telephone. Ravengar had, beyond doubt, deliberately set himself to lure Camilla back to England, and he had succeeded. Beyond doubt, all her movements had been spied and marked, and Ravengar had been in a position to complete his arrangements--whatever his arrangements were--at leisure and with absolute freedom. She had taken a room in Horseferry Road, and he had followed.... What was the sequel to be? That she was in his power at that moment Hugo could not question. And the chloroform? At that moment Ravengar had meant that the Hugo building should have been a funeral pyre--a spectacle to petrify the Metropolis. And it seemed to Hugo that if Ravengar was mad, as he must be, he could only have designed the spectacle as something final, as at once a last revenge and an accompaniment to the supreme sacrifice of Camilla. 'We must get into that house immediately,' said Hugo, when he had finished his own narrative. 'The question is how?' 'I've got a card of Inspector Wilbraham's, of the Yard, in my pocket,' Albert suggested. 'We might use that, and make out that this purchase of chloroform under a false name had got to be explained to the Yard instantly.' Albert had recently become rather intimate with Scotland Yard. Inspector Wilbraham had even called on him in reference to Bentley's death and the disappearance of Brown; and Albert was duly proud. 'We will try that,' said Hugo. 'Have you any handcuffs?' 'No, sir.' 'Go and obtain a couple of pairs. You can be back in twenty minutes. Bring also my revolver.' Hugo and Simon were left alone. Hugo spoke no word. 'I'll put the room to rights, sir,' said Simon, after a pause. He could bear the inaction no longer.