Once upon a midnight dreary, while I pondered, weak and weary, 
Over many a quaint and curious volume of forgotten lore— 
    While I nodded, nearly napping, suddenly there came a tapping, 
As of some one gently rapping, rapping at my chamber door. 
“’Tis some visitor,” I muttered, “tapping at my chamber door— 
            Only this and nothing more.”