MLA
Jacobs, Lawton. Letter from Lawton Jacobs (Richmond, Virginia) to Miss Edmons Hainback, (Black & Whites, Virginia), Telling of the Difficulties in Delivering Goods Purchased by Miss Hainback and of Having These Goods Sent by American Express - March 5, 1865. 1865. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 4, Folder 5. https://digital.library.emory.edu/purl/006sxksp1j-cor.
APA, 6th edition
Jacobs, L. (1865). Letter from Lawton Jacobs (Richmond, Virginia) to Miss Edmons Hainback, (Black & Whites, Virginia), telling of the difficulties in delivering goods purchased by Miss Hainback and of having these goods sent by American Express - March 5, 1865 (Box 4, Folder 5) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/006sxksp1j-cor.
Chicago
Jacobs, Lawton. “Letter from Lawton Jacobs (Richmond, Virginia) to Miss Edmons Hainback, (Black & Whites, Virginia), Telling of the Difficulties in Delivering Goods Purchased by Miss Hainback and of Having These Goods Sent by American Express - March 5, 1865.” Letters (correspondence). Civil War Collection, 1865. Box 4, Folder 5. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/006sxksp1j-cor.