Gee whiz Curteye,
I have no technical words of wisdom BUT on the other hand, that is terrific. Years back I used to work with seniors when I was about 25. I am now one of them but used to speak with them during the course of their visits for a few hours cumulatively. These people were around during the turn of the 20thcentury and had stories to tell about the most interesting stuff.
One man was an apprentice in Thomas Edison’s lab, they called Edison " chew tobacco Ed". Stories of the town I live in when the Main Street was a dirt road were very cool, in Vermont I was told stories of real farm life in the 1900’s and WW1. One man told me of racing motorcycles in 1912 on wooden velodromes, Indians of course.
I applaud your great efforts and of course, if these ever go into public domain, would happily enjoy listening . This may be a life changing moment for both of you. It certainly helps your head.
Very best of luck. Al