In the verses of "The Raven," the note values increase in the middle and at the end, corresponding to the third and sixth lines of the lyrics (according to how they're formatted on the Alan Parsons Project website) but to the second and fourth lines of this notation:
These longer values musically represent the duration of "for evermore" in the lines "That I shall hear for evermore" and "And I must hear for evermore" in the second and third verses, respectively, and in the earnestness of the request in the line "No matter how much I implore" in the third.
