Have you requested the marriage records? I found some books that may be helpful. 1. Sangamon Co. IL Birth Records 1860-1888. 2. Sangamon co. Il Marr. Records 1879-1889. 3. Obits 1861-1896. 4. Index to Recorrd of Letters & Wills 1901-1946. 5. 1860, 1870 Census I will place an interlibrary loan request on the above five titles and let you know.