Thankyou Linde.I will have to look up John Adair, son of Henry now.
I managed to find the book in the archives.org website. - the small note on Robin Adair reads (errors in copy) :
" * Here I may mention, in reply to inquiries I have often read in public print Who composed and who was the hero of the popular song Robin Adair ? Lady Caroline Keppel, daughter of the second Earl of Albeniarle, composed it, and Kobert Adair, whom she afterwards mar- ried, and who was surgeon-general to King George the Third, and second son of Sir Robert Adair, who fought for King William at the Boyne,. and died in College-green, Dublin, in 1745, was the hero. " ....................... Robin may have been the son of Sir Robert's third wife, perhaps Miss MacAulay whom I think he married Aug or Oct in 1720, just a few months after the death of his second wife.
Any descendants of John, author of the book,out there ?