15th: John found in action?

(Refer to previous posts dated the 10th and the 3rd)
Ross and I have been mulling over the implications of the newfound baptism of John to John Fairbairn of Grenville, and reviewing what we do and  don't know, and what the dna evidence tells us.
Then along came a copy of a document from the Fairbairn file at the archives of Wellington County, Ontario (thank you Duncan, you don't know what you started!).  It was undated, and unsourced, but was obviously a tree that I'd been given extracts from previously many years ago.
(I've included the tree on the DNA Project Patriarchs page, along with links to the dna project supplementary pages where you can find some commentary on the erroneous family linkages shown).
The archivist advises that it was catalogued in 1994, and submitted by a Nora CARLAW of Elora, now deceased.
From the document she would appear likely to be a descendant of David and Charity (WALKER) FAIRBAIRN.
Whereas the tree contains many errors of fact in linking up earlier generations, it has provided two very significant clues with regard to the family of what we had previously shown as David and Jane (WILLIAMSON) FAIRBAIRN, namely that Jane's husband was a John, not a David, and gave his date and cause of death.

All of which has led me to republish the web pages for the following two Johns:
John, son of Archibald and Alison (CROSSER) FAIRBAIRN, and
John, son of "John or David" and Jane (WILLIAMSON) FAIRBAIRN.

You may be interested in the discussion on the former John's web page.

I haven't yet bitten the bullet and merged the families, as there's still the puzzle over William and Aylsie (ELLIOT) FAIRBAIRN, given as parents to the William who married Jean (WANLESS), to re-evaluate the evidence for.

As the notes for John state, it would be really really great to find a proven direct FAIRBAIRN male line descendant of the families concerned for the FAIRBAIRN Surname DNA project to see what additional weight can be given to this re-evaluation:
"John or David" & Jane (WILLIAMSON) FAIRBAIRN
Archibald & Alison (CROSSER) FAIRBAIRN
David and Jane (HERD) FAIRBAIRN
Walter & Agnes (ROBINSON) FAIRBAIRN

Marriage found; dna*2 day

Ross's hunch, back in 2003, from the 1841/2 Grenville census, that David, son of David and Jane (WILLIAMSON) FAIRBAIRN was married earlier than to Charity, looks accurate. At that time the census merely showed how many people of what sex, age and marital status were in the household, and it implied that David and a young wife were in the house, although David and Charity didn't marry until 1845, and her age didn't match that of the other married female in the house besides Jane, David's mother.
While looking for something else, as so often happens, I stumbled upon a marriage in 1841 of a David FAIRBAIRN and Prudential ARNOLD in the Presbyterian Church records in the Drouin colleciton showing they were married at "Grenville, Ottawa" by William MAIR, Minister of Grenville & Chatham, witnesses were John BLAIR and John TOPLAND.
In the same set of records were David and Charity's marriage, and the baptism of their son David.

The FAIRBAIRN DNA project is looking set to examine more closely the "cousin" relationships that have so taxed my brain and genealogical inventiveness. William has joined as a rep. of the line of John A FAIRBAIRN Snr of Stillwater, whose son John A of Hoquiam is the one these relationships were all reported to: Angus s/o the above David and Charity (WALKER) F.; Albert who emigrated from Sunderland to Hoquiam, an unlikely choice about 100 years after John Snr's parents had left Scotland; and Walter to Clarissa.
How I currently see these relationships can probably best be viewed starting at the dna oriented descendant chart for David and Jane (WILLIAMSON) FAIRBAIRN, and from the charts listed on William's dna page, not that his results are in yet, as the kit has only just been ordered, patience (not one of my strong points)!

It is obviously a dna day today. We now have a DAVIDSON representative who has been enrolled in the DAVIDSON project (not one of mine), that just might help us break thru the brick wall of finding more about John DAVIDSON. Although I strongly suspect he was the illegitimate son of the mother Ann COLLINS shown on his death cert, his father was more as like a DAVIDSON given the naming conventions of the time.