Dufftown,
You are very lucky to have the knowledge, expertise & thoroughness of Forfarian helping you!
I agree fully on us having theories & assumptions in our trees as I'm sure we all do but without proof it will remain as such & I don't see any benefit in professing things are true where there's no evidence to back it up.
It is not for the 1st time I've mentioned to people, just because you find info. in a 'published' book or by some 'known' person, doesn't make it true.
I've seen many errors in published data by doing my own research but I've also been challenged on info. I corrected & gave to someone (to help them) who was using data from a 'published' book & was more or less told a few times I was wrong although not in so many words.
That person kept reminding me if you like (in a tone)..."the info. I have is..."
I then produced the docs to prove it, much to my annoyance as the person themself hadn't spent £7.50 on SP for the info. before questioning my knowledge of facts.
The tone changed after that I can assure you

Annie