Read it through once

No sooner had these syllables passed my lips, than--as if a shield of brass had indeed, at the moment, fallen heavily upon a floor of silver--I became aware of a distinct, hollow, metallic, and clangorous, yet apparently muffled reverberation. Completely unnerved, I leaped to my feet; but the measured rocking movement of Usher was undisturbed. I rushed to the chair in which he sat. His eyes were bent fixedly before him, and throughout his whole countenance there reigned a stony rigidity. But, as I placed my hand upon his shoulder, there came a strong shudder over his whole person; a sickly smile quivered about his lips; and I saw that he spoke in a low, hurried, and gibbering murmur, as if unconscious of my presence. Bending closely over him, I at length drank in the hideous import of his words.