1880 census shows a Florence G. Thomas with daughter Mary E. Thomas living with Joseph and Mary. Florence appears on the 1850 census too. Appears to have remarried and died in Riverside, California on 6 Feb 1918. This death record provides birth information as well. Supposedly buried in Evergreen Cemetery, Riverside, CA and was widowed as “Cults” being the last name. Cannot find anything on Findagrave to confirm this.