TePaul,
Not sure more lengthy writing is the way to say what we learned! Part of what we should learn is shorter writing, and not repeating ourselves!
As to the bigger picture, to which I am sure you allude, I would urge all courses to find out as much about their history as possible and the sooner the better. Even for new courses, finding out which associate did was for a gca, putting together a Sayre Scrapbook chronologically, and taking pictures of the course the day it opens, every so often and after every change (including photos of pipes and what not going in the ground that will be covered up later) is good to do ASAP.
It is surprising how many courses go on "oral history" and memory and don't document.
As to those historical researchers, I have mentioned that I have been doing a bit of historic research, for which I have considered getting published. This has, like Wayne and TePaul, been going on for many years, and has accelerated with the advent of the internet.
I never have published that, or even shown it to anyone. I have never been quite sure I had enough info, and sure enough, often I have proved myself right!
I wonder if Doak and Klein, among others who have written history books decided that they had enough? Surely, some point or another on Ross's hundreds of courses will come up after the publication of the book because you have to cut it off sometime.
Its amazing, really, all the info that is out there if you keep looking. I can check some of the sites or Google a particular way and in a weeks time, find even more new stuff. So I keep going, but don't keep writing.
BTW, one tip I got on historic research is to Google more general topics. Even if you are looking for specific thing like green construction, those who tag photos for search engines think in terms of "golf course." And, sometimes, photos or articles will show up in the damnedest places. You might find some info on Merion by searching "Pennsylvania." So, Google early and Google often, albeit not being afraid to think outside the box.
And, if and when you decide to publish your findings, undersell and over deliver and write with the attitude that this is what we know now, not this is the truth.