Granger's World of Poetry: This databases contains 250,000 poems in full text and 450,000 citations, numbers that will continually expand with each update. The poems in full text are the most widely-read in the English language.
Humanities Full Text (EBSCO): This database contains periodicals in literature, history, philosophy, classical studies, gender studies, performing arts and religion.
JSTOR: This database has access to back issues of core journals in the humanities, social sciences and sciences. There are over 700 titles available.
Literature Criticism Online: This database has access to Short Story Criticism. Short Story Criticism has an excellent section on the Tell-Tale Heart.
Literary Reference Center Plus (EBSCO): This database offers literary criticism, author biographies and work overviews.
Literature Resources From Gale: Biographies and critical analyses of authors from every age and literary discipline.
Virtual Reference Library from Gale: This database offers access to many ebooks including Short Stories for Students. This database might be a good place to start your research.