A Glare of Skulking Ferocity

I concealed myself in the dark dressing room, that opened upon the poor patients room, in which a candle was burning, and watched there till she was fast asleep. I stood at the door, peeping through the small crevice, my sword laid on the table beside me, as my directions prescribed, until, a little after one, I saw a large black object, very ill-defined, crawl, as it seemed to me, over the foot of the bed, and swiftly spread itself up to the poor girls throat, where it swelled, in a moment, into a great, palpitating mass. For a few moments I had stood petrified. I now sprang forward, with my sword in my hand. The black creature suddenly contracted towards the foot of the bed, glided over it, and, standing on the floor about a yard below the foot of the bed, with a glare of skulking ferocity and horror fixed on me, I saw Millarca. Speculating I know not what, I struck at her instantly with my sword; but I saw her standing near the door, unscathed. Horrified, I pursued, and struck again. She was gone; and my sword flew to shivers against the door. Scorched oud, bitter resins, black musk, a torn shred of gossamer vanilla, and a clang of metal.