Many libraries, archives, and museums digitize archival material and make it freely available online to anyone. A sample of relevant digital archives are linked below. To look for more, try Googling your topic + digital archives or libraries or collections.
To find primary source material in OneSearch, type in keywords for your topic and add one of the words below as a second keyword. For example: "Abigail Adams" correspondence
women "american revolution" letters
correspondence | diaries | interviews |
manuscripts | narratives | sources |
speeches | letters | documents |