sentences:  It was eventually incorporated into "The Fall of the House of Usher" as a song written by Roderick Usher.The poem serves as an allegory about a king "in the olden time long ago" who is afraid of evil forces that threaten him and his palace, foreshadowing impending doom.As part of "The Fall of the House of Usher", Poe said, "I mean to imply a mind haunted by phantoms — a disordered brain"  referring to Roderick Usher.