‘I shall begin to think that you really are a magician,’ she said, lightly.

‘I could show you strange things if you cared to see them,’ he answered, again raising his eyes to hers.

‘I don’t think you will ever get me to believe in occult philosophy,’ she laughed.

’Yet it reigned in Persia with the magi, it endowed India with wonderful traditions, it civilised Greece to the sounds of Orpheus’s lyre.’

He stood before Margaret, towering over her in his huge bulk; and there was a singular fascination in his gaze.  It seemed that he spoke only to conceal from her that he was putting forth now all the power that was in him.

’It concealed the first principles of science in the calculations of Pythagoras.  It established empires by its oracles, and at its voice tyrants grew pale upon their thrones.  It governed the minds of some by curiosity, and others it ruled by fear.’

His voice grew very low, and it was so seductive that Margaret’s brain reeled.  The sound of it was overpowering like too sweet a fragrance.

I tell you that for this art nothing is impossible.  It commands the elements, and knows the language of the stars, and directs the planets in their courses.  The moon at its bidding falls blood-red from the sky.  The dead rise up and form into ominous words the night wind that moans through their skulls.  Heaven and Hell are in its province; and all forms, lovely and hideous; and love and hate.  With Circe’s wand it can change men into beasts of the field, and to them it can give a monstrous humanity.  Life and death are in the right hand and in the left of him who knows its secrets.  It confers wealth by the transmutation of metals and immortality by its quintessence.’

Margaret could not hear what he said.  A gradual lethargy seized her under his baleful glance, and she had not even the strength to wish to free herself.  She seemed bound to him already by hidden chains.

‘If you have powers, show them,’ she whispered, hardly conscious that she spoke.

Suddenly he released the enormous tension with which he held her.  Like a man who has exerted all his strength to some end, the victory won, he loosened his muscles, with a faint sigh of exhaustion.  Margaret did not speak, but she knew that something horrible was about to happen.  Her heart beat like a prisoned bird, with helpless flutterings, but it seemed too late now to draw back.  Her words by a mystic influence had settled something beyond possibility of recall.

On the stove was a small bowl of polished brass in which water was kept in order to give a certain moisture to the air.  Oliver Haddo put his hand in his pocket and drew out a little silver box.  He tapped it, with a smile, as a man taps a snuff-box, and it opened.  He took an infinitesimal quantity of a blue powder that it contained and threw it on the water in the brass bowl.  Immediately a bright flame sprang up, and Margaret gave a cry of alarm.  Oliver looked at her quickly and motioned her to remain still.  She saw that the water was on fire.  It was burning as brilliantly, as hotly, as if it were common gas; and it burned with the same dry, hoarse roar.  Suddenly it was extinguished.  She leaned forward and saw that the bowl was empty.