I have some info on Eudora Brigham, mar. William P. Nichols in 1858, dtr. Sallie Nichols, b. Mar. 1865. She was a daughter of James H. Brigham (1794-1841) and Sarah Wilson, granddaughter of John Brigham (1766-1836)and Hannah Barber, grgranddtr of James Brigham (1735-abt 1818)and Louisa Looney. James H. Brigham had a son, Rev. John Harvey Brigham, b. 31 Aug. 1817, Humphreys Co., TN. I imagine the others listed in the 1860 census you cite are his siblings, rather than his children, but I don't know. I can send you the information I have, and would like to obtain your information about this line.
David Salmon
dsalmon@salmon.org