PG's Ancestry DNA test result has come through. You can see the regional breakdown of his antecedents on this publicly available page.
According to my DNA matches page on the system, he is the fourth most closely related person to me among those who have done the test. Coming - unsurprisingly - after my son, my nephew, and my niece.
To me the next logical step would seem to be to start work on his family tree. I have done mine to a certain extent, maybe I could repurpose some of that that; my great grandparents on my father's side being his mother's parents?
If you click the DNA tab on the website, select Settings and then go to Sharing Preferences, other users can be given permission to "view and modify test details and message users." I wonder if he sets that up for me if we could work through this together?