Tillie's headstone is in rough shape - that and the 1880 census are the only records I can find.
Headstone reads (afaik) Tillie J. - DIED Sept 5 1880 - AGED ? years. The years is key here. It looks like an 8. But it's not "weighted" the same as other 8s on the stone... which leads me to think it may be a 2. This with the census record leads me to have an 1878 DOB. But in the end, with no other records, it's a guess.