I'm familiar with your tree as I received a wonderful letter from John Gow -your brother? -from new Zealand containing the chapter of your Dad's book on Glasnafied and the family tree. You are right about the records being destroyed making it hard to establish the right connection to Donald Gow and Cristen McAree - I'm still working on that. It appears that my tree branches off from yours from Alexander Gow - your Dad suggests he may have married twice, with my line from his second marriage. The subject common to both lines, however, is Glasnafied. You may be interested to know that I have establised the exact location of Glasnafied using old maps from National Library of Scotland and Google Maps. I visited the place not so long ago and was amazed to find ruins of the old farmhouse. I've got some great photos if you'd like to see them?
Email me at firstname.lastname@example.org and I'll send them to you, along with anything else I can find from that generation.