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We are a bit out of my area of research here, but the search for the Adamson family has been ongoing for some years. They were apparently connected with the tea business.
The Adamsons were very much involved in Dumfriesshire and Galloway Natural History Antiquarian Society in the 1980s and were still resident at their address in 2004:
Westerlea, Roberts Crescent, Dumfries. Tel. Dumfries (0387) 52930 (That phone number is now outdated)
You are probably aware of this: https://www.rootschat.com/forum/index.php?topic=430415.18
Thank you for your reply. I do have information about the family after they left Dumfriesshire. It would appear that any prior link with Comlongon has been lost in the mists of time. Thanks again though.