The first part of Cadaeic Cadenza is slightly changed from an earlier version, "Near a Raven", which was a retelling of Edgar Allan Poe's "The Raven".
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In addition to the main restriction, the author attempts to mimic portions, or entire works, of different types and pieces of literature (The Raven, Jabberwocky, the lyrics of Yes, The Love Song of J. Alfred Prufrock, Rubaiyat, Hamlet, and Carl Sandburg's Grass) in story, structure, and rhyme.