What are the next 4 lines of Edgar Allan poem Once upon a midnight dreary while I pondered weak and weary?

You're thinking of Edgar Allan Poe's famous poem, "The Raven." The next four lines are:

> Over many a quaint and curious volume of forgotten lore—

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> While I nodded, nearly napping, suddenly there came a tapping,

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> As of some one gently rapping, rapping at my chamber door.

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> “’Tis some visitor,” I muttered, “tapping at my chamber door—

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> Only this and nothing more.”