Re: Adair wills.
In the Irish Gengealogical Reserach Society library in London there is an Index to Betham Pedigrees listing ADAIR in -
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Robert Adair's will 1737 listed Mary Purdon as his sister.
Betham was the Herald for Ulster and his abstracts of Armagh Prerogative Wills giving Robert Adairs is on Reel 309-3.
Believe they can be ordered from LDS