You can search the library's catalog to find primary source materials. The best way to conduct a search is do an advanced search and enter either sources, diaries or journals, or correspondence with your keywords. See picture below:
Please be aware that it sometimes appears that we own a copy of book, but it is the book review. If we own the title, Texas A&M University-San Antonio Library will appear on the last line of the citation. The library's catalog also gathers titles that appear within San Antonio area libraries and throughout the world. These books will either have San Antonio Libraries or WorldCat Libraries on the last line. Any book that is tagged San Antonio Libraries can be checked out by using a TexShare card. For any book that is tagged WorldCat Libraries an Interlibrary Loan request can be made to get that book to the patron.
Using the links below, one can find primary sources that similiarly themed:
African Americans -- Correspondence.
Intellectuals -- United States -- Correspondence.
Legislators -- United States -- Correspondence.
Pioneers -- West (U.S.) -- Diaries.
United States -- History -- Civil War, 1861-1865 -- Personal narratives.