On Thomas R Wyatt's gravestone in St. Clair County Missouri, it lists Saunders Wyatt and Eliza Ralston as his parents. He was born March 5, 1846 and died on April 11, 1924. I find Sanders Wyatt and Eliza on the 1850 Wright County Missouri census with the following children: Ellen age 11; William age 9; Sarah age 5; Thomas age 4 (fits his gravestone); and Mary age 1. Missouri was a very harsh place to be during the Civil War. So far I haven't found this family in 1860.