In a few seconds a pale, orange-coloured flame appeared hovering over the crucible. As its ghostly light fell upon her anxious features, she caught sight of herself in a mirror let into the wall on the opposite side of the table. She started back in her chair with an irrepressible shudder. For the first time in her life she saw herself as she really was.

The weird, unearthly light of the flame changed the clear, pale olive of her skin into a sallow red, and cast what looked like a mist of vapour tinged with blood across the dark lustre of her dusky eyes. It seemed as though the light that she had called forth from the darkness had melted the beautiful mask which hid her inner self from the eyes of men, and revealed her naked soul incarnate in the evil shape that should have belonged to it.

Suddenly the flame vanished, she turned on the switch of the lamp, placed a platinum cover over the crucible with a pair of light, curved tongs, and, with a quick half-turn, screwed it hermetically down. Then she turned the heat of the furnace on to the full, rose from her chair, and stretched herself, with her linked hands above her head, till her lithe, girlish form was drawn up to its full height in front of the mirror.

She looked dreamily from under her half-closed lids at the perfect picture presented by the reflection, and then her tightly-closed lips melted into a smile, and she said softly to herself—

“Ah, that is a different sort of picture. I wonder what Alan would have thought if he could have seen that one? I don’t think I should have taken my trip in the air-ship to-morrow if he had done. Well, I have seen myself as I am—what four generations of inherited hate and longing for revenge have made me.

“In the light of that horrible flame I might have sat for the portrait of the lost soul of Lucrezia Borghia. Ah, well, if mine is lost, it shall be lost for something worth the exchange. ‘Better to rule in Hell than serve in Heaven,’ as old Milton said, and after all—who knows?

“Bah! that is enough of dreaming, when the time for doing is so near. I must get some sleep to-night, or my eyes will have lost some of their brightness by to-morrow.”

So saying, she busied herself putting away her phials, and powders, and apparatus. The half of the colourless liquid she had left she carefully decanted into a tiny flask, over the stopper of which she screwed a silver cap that had a little ring on the top, and this she hung on the chain round her neck. She replaced the slip of parchment in its silken bag, and carefully burnt the paper on which she had made her calculations.

By this time the bottom of the crucible was glowing red hot. She noted the time that had elapsed since she had screwed the cap down, waited five minutes longer, and then extinguished the furnace, undressed, and got into bed, and in half an hour was sleeping as quietly as a little child. She had set the chime of her repeating watch to sound at six, and hung the watch close above her head.

Calm as her sleep was at first, it was by no means dreamless, and her dreams were well fitted to be those of a guilty soul slumbering after a work of death.