Literary History is an index to full-text internet published articles
covering more than 250 major American and British writers.
"The links take you directly to thousands of thought-provoking articles by
scholars, critics and poets, all screened by Jan Pridmore, an independent scholar specializing in English literature."
(There is some advertising on the site.)
From the site:
We exclude the commercial, the ungrammatical, the anonymous, the illegal, and we do everything we can, short of peer review, to weed out the unreliable. There is still much left that is solid, authoritative, and worth cataloging. And contrary to fears about the lack of persistence of web links, I've noticed in the twelve years I've maintained this site that much of the best material has been stable.