Thank you for replying, Judy. I have not been able to find any marriage records for Robert and Ellen, nor a death notice for him. I descend from their son, John b 1825 and am in contact with other descendants from siblings, as well. No one has solved the mystery definitively if Robert Sr. and Sarah are the correct parents, as nothing has been found to rule out or prove, be it church records, census, probate, land, etc. The Robert mentioned in the pension file might well be my ancestor, but not enough evidence by genealogical proof standards. Hoping a family Bible might turn up eventually, who knows?
Thank you again!