According to Ancestry.com, L. C. Dover married G.W. Clark on February 2, 1870 in Cherokee County, Texas. In 1870, Lucy C. or E. Clark, age 18 (b. 1852), b. Georgia, was keeping house with George W. Clark, age 19, b. Texas, working on farm. They were living with George's parents in Jacksonville (Beat 3) Cherokee County, Texas. I searched all of Beat 3 and found no other Dovers. I believe this is Lucy, daughter of Campbell Dover. Marjorie Dover Stansel