I don't know if this is too late to help but my GG grandparents are Rachel (Ruble) and Jeremiah Garrison. Based on the Civil War Pension Index, I believe that Jeremiah left the family, went west to Nebraska, and started another family using another first name. My G grandmother was Mary Elizabeth Garrison b. 4 Feb 1850 d. 31 Dec 1917 in Abingdon, Knox, Illinois. She first married James Smith, and as a widow, remarried David Tullis. I am still trying to locate Rachel and Jeremiah's parents. I do have additional information (other brothers and sisters) if you contact me i will be glad to share what I have. Would love to hear from anyone with ties to my family/s.