Referring the lineage to the Robert Acheson - PA>OH>IA line and not the PA>OH>IA>KS line, believe the KS line maybe a sibling of Robert Ramsay Acheson - unable to make the link to KS from Robert Ramsay. Both Leslie and Christina and Robert and Florida are buried in Valley Junction, IA.
My information so far is..... Leslie Dryden Acheson married Christina Peterson Acheson - IA Leslie Dryden's parents are Robert Ramsay Acheson and Florida Catherine Childress Acheson - IA. Robert Ramsay Acheson's parents are Robert Acheson and Eleanor McDonald Acheson - OH Robert Acheson parents are John Acheson and Sarah Ramsay Acheson - PA-OH. I am working on the parents of John Acheson born 1774.