Researchers often find important information in the letters and papers of abolitionists. Black Boston activist William Cooper Nell's papers are particularly helpful, as are the Black Abolitionist Papers and the Letters of William Lloyd Garrison.
Find information about African Americans by searching the full text of millions of books in Google Books and the HathiTrust Digital Library. Note the name of the library that provided the book as well as the book's title, author(s), publisher name and location, date, and the page(s) where the information can be found.
If there are no options for printing or downloading, try to take a screenshot of the page that you need and/or check your library catalog to see if your library has a copy of the book.
In some cases, you will find your search terms highlighted in the text but won't be able to view the book. If there are copyright restrictions, the entire book will not be displayed.
Search for these and other geographic-specific books in WorldCat or your library catalog. Use keywords or Library of Congress Subject Headings such as African Americans--California or Slavery--Tennessee.