Carmack, Catherine E. "A Tennessee Planter Family in Transition, 1849-1867." Master's thesis, Middle Tennessee State University, 1995.
The strength of George and Jane Washington's marriage is one of many topics covered in this thesis.

Crockett, David. "Mrs. Crockett and Mrs. Crockett: Two Franklin County Wives." Franklin County Historical Review 22, no. 2 (1991): 67-76.

Jones, Shirley Farris. "Morgan's Wedding." Rutherford County Historical Society Publication No. 34 (1994): 1-22.
The courtship, marriage, and subsequent lives of Martha Ready and John Hunt Morgan are covered.

McGrady, James Waring. "Courtship by Mail: A Franklin County Romance." Franklin County Historical Review 21, no. 1 (1990): 6-15. Postcards from 1913-15 are used to describe the developing relationship between Belle Hopkins and Roy Franklin.

Scott, Prudence Polk. Annie of Oak Hill, An 1850 House and It's Family. Bessemer, Ala.: Colonial Press, 1990. 237 p.
Includes the text from a Valentine's Day card that Robert Hill sent to Annie Eola Patterson. Their courtship and married life are covered in detail.

Sikes, Lewright B. "Gustavus Adolphus Henry: Champion of Lost Causes." Tennessee Historical Quarterly 50 (Fall 1991): 173-82.
Includes an excerpt from a letter that Gustavus Henry sent to his future wife, Marion McClure, at the height of their courtship (p. 174). Also includes a photograph of Marion McClure Henry.

Henry, Gustavus A. Papers. Southern Historical Collection, University of North Carolina at Chapel Hill.
Online inventory: http://www.lib.unc.edu/mss/inv/h/Henry,Gustavus_A.. Sikes (see article cited above) notes that "Henry adored Marion as his many warm letters to her throughout his life reveal" (p. 174).