I was pleased to find your email of April 24, 2002. I am also linked to the John AIRD - Janet "Jean" McNAUGHT tree. Whilst you are in the Thomas AIRD (1st child) branch I am in the Archibald Brown (5th child) AIRD branch. Below is a summary of the information that has been gathered by myself and other researchers (family members) in Australia.
If you would like a more expanded listing I can forward agedcom file (or similar)to your email address. Should you or any other members of the John Aird tree be interested they can respond to this email or write to me at email@example.com
Looking forward to hear from my Scottish (or others) relatives.