Mary Emma Bailey kept a few diaries. Here is one from 1962.
Notebook containing some family notes, including genealogy
These files show relationships in the genealogy notes. Joseph and Henry, sons of David Adair and Margaret Ann Young, married siblings Rose and Jennie.
Note that my great-grandfather John Wesley Adair is a brother of Joseph and Henry. David and Margaret had 11 children.
Descendant chart of Joseph Dixon Adair and Rose Ann Speckman
Descendant chart of Henry Alfred Adair and Jennie E Speckman