To find letters or other manuscripts by your poet, search for "[poet name] correspondence" or "[poet name] manuscript". You may also try some of the resources below.
Emily Dickinson
Elizabeth Bishop
Databases can contain a combination of full text articles (ready to read online) and/or citation information about articles, book chapters, or books.
Donne in Manuscript (from Digital Donne)
Click on "A Valediction Forbidding Mourning ['As virtuous men pass mildly away']"
Can't find the full text of the article?
Click on the button.
It will try to direct you to the full text of the article.
For articles that we don't have electronically,