Thanks for the info. You can check out the raven activities on the site. The poem tells about a man who, immersed in reading books, tries to forget about his grief. A knock on the door distracts him. When the lyrical hero opens the door, he does not see anyone. This situation again immerses the hero in his mournful thoughts. There is another knock and a raven flies through the window. This bird here is a karmic symbol. The author does not accidentally use a refrain, as this enhances the overall drama of the work, forcing a mournful and mystical atmosphere: the repetition of the words: “Nevermore”, “… And nothing else” sounds like a spell.