I believe that Nancy Bright Merrill was the mother of Caroline Merrill Sanders Lyon (b. 18 May 1834 in Cincinnati, OH; m. (2) Howard William Lyon 14 Feb 1864; d. 12 May 1879 in Onarga, IL) . Caroline (age 16) and her first husband, Richard Sanders (age 22) were living in the home of Nancy Merrill in St. Louis, Missouri on the 1850 census. I think that Nancy Bright Merrill and her husband Daniel (?) may have run a boardinghouse in St. Louis but by 1850 Daniel was deceased. By the 1860 Census, Richard Sanders was deceased (or they had divorced) but Caroline (26), a seamstress, was still living with her mother in St. Louis. Richard and Caroline Sanders had 2 children – Richard Sanders and Violetta Sanders Conn (w/o Smith Conn) but neither of the children is shown on the 1860 census with their mother. On the 1870 Census, Nancy Merrill (56) is shown living with Smith (28) and Violetta (17) Conn in St Louis. Nancy Bright Merrill shows her birthplace as Virginia but I haven’t yet been able to connect her to a specific Bright Family.