Incubus, phantasmagoric, cataleptical and miasma. Would one say that these were difficult words to understand? Well, maybe if they were a high school student. Edgar Allen Poe uses strong advanced words for his literature such as The Fall Of The House Of Usher. Students, now in the 21st century are becoming more lazy with their studies which is now making old advanced stories such as this one, a more bigger challenge. Edgar Allen Poe uses tough vocabulary and sentence structure to reinforce the theme by keeping the mood grotesque and by bringing an imagination or hallucinations to the theme.