The resources listed here are not the only ones available. Many others are in print or microform and can be found by searching library catalogs, like CMU's library catalog, or Worldcat, a database of library holding thoughout the world (though mainly U. S.). Use some of these terms combined with your topic:
early works to 1800
women and diaries
slavery and "early works"
The resources listed in the For More box on this page can provide you with additional subject specific resources.