However extraordinary such effects, they were not incredible,--not at variance with our notions of the known laws of nature. And to the vapour or the odours which a powder applied to a lamp had called forth, I was, therefore, prepared to ascribe properties similar to those which Bacon's conjecture ascribed to the witches' ointment, and the French traveller to the fumigations of the African conjuror. But, as I came to that conclusion, I was seized with an intense curiosity to examine for myself those chemical agencies with which Sir Philip Derval appeared so familiar; to test the contents in that mysterious casket of steel. I also felt a curiosity no less eager, but more, in spite of myself, intermingled with fear, to learn all that Sir Philip had to communicate of the past history of Margrave. I could but suppose that the young man must indeed be a terrible criminal, for a person of years so grave, and station so high, to intimate accusations so vaguely dark, and to use means so extraordinary, in order to enlist my imagination rather than my reason against a youth in whom there appeared none of the signs which suspicion interprets into guilt. While thus musing, I lifted my eyes and saw Margrave himself there at the threshold of the ballroom,--there, where Sir Philip had first pointed him out as the criminal he had come to L---- to seek and disarm; and now, as then, Margrave was the radiant centre of a joyous group. Not the young boy-god Iacchus, amidst his nymphs, could, in Grecian frieze or picture, have seemed more the type of the sportive, hilarious vitality of sensuous nature. He must have passed unobserved by me, in my preoccupation of thought, from the museum and across the room in which I sat; and now there was as little trace in that animated countenance of the terror it had exhibited at Sir Philip's approach, as of the change it had undergone in my trance or my fantasy. But he caught sight of me, left his young companions, came gayly to my side. "Did you not ask me to go with you into that museum about half an hour ago, or did I dream that I went with you?" "Yes; you went with me into that museum." "Then pray what dull theme did you select to set me asleep there?" I looked hard at him, and made no reply. Somewhat to my relief, I now heard my host's voice,-- "Why, Fenwick, what has become of Sir Philip Derval?" "He has left; he had business." And, as I spoke, again I looked hard on Margrave. His countenance now showed a change; not surprise, not dismay, but rather a play of the lip, a flash of the eye, that indicated complacency,--even triumph. "So! Sir Philip Derval! He is in L----; he has been here to-night? So! as I expected." "Did you expect it?" said our host. "No one else did. Who could have told you?" "The movements of men so distinguished need never take us by surprise. I knew he was in Paris the other day. It is natural eno' that he should come here. I was prepared for his coming."