Stanza 4
          Presently my soul grew stronger; hesitating then no longer,

             "Sir," said I, "or Madam, truly your forgiveness I
implore;

       But the fact is I was
napping, and so gently you came rapping,

       And so faintly you came tapping, tapping at my chamber
door,

That I scarce was sure I heard you" - here I opened wide the
door-

                                                 Darkness there and nothing
more.
KEY:
bold: alliteration
itallics: internal rhyme
underlined: rhyme
In the fourth stanza, the speaker goes to his chamber door to see who is knocking. Before opening the door he says, "Sir, or Madam, truly your forgiveness I implore: but the fact is I was napping, and so gently you came rapping at my chamber door, that I scarce was sure I heard you." Then, when he opens the door wide, he sees nothing. "Darkness there and nothing more," is what the last line of the stanza states to describe what the speaker sees.
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