Hi Peggy, I have nothing on Knox....but do have Robison in my Guthrie tree. I show Lydia Guthrie, b. 17 Jun 1810, marrying John Robison and they had 9 children. Not many details, but Robison names are: John H. b. 1844, Nancy A. 1849, Margaret A. 1851(m.Shannon), Rebecca E. 1855(m.John Johnson), William 1857, David 1835, Mary (m.Dunn), Sarah 1837(m. Joseph Randolph), Robert C. 1841. Lydia was one of 16 children born to Robert Guthrie jr b. 1786 and Jane Cunningham. (Robert was son of Robert sr., b. 1752 and Eliz Jane Caldwell.) Don Wagner, New Philadelphia,Oh.