Phil,
Why wasn't it documented that the reasons they hired Raynor over others? Was it fear of harrassment suits? Oh wait, that came later......
BTW, when Whitten and Cornish were doing their original book, I know they also spent a lot of time tracking down descendants of the architects themselves, who occaisonally had old plans, etc. I know he has the original Flynn drawing for Indian Hill (Creek?) in Florida, for example (I recall because it ripped a bit while I was holding it, thereby nearly ending our friendship.....) But I digress. Their could be some problems with that. I know my files have some drawings that were proposals only, and not final jobs I did get the commission, and that could throw you off the trail.
I know that historians in other fields are now looking at any old garbage dumps they find, to try and find more about day to day life way back when. I wonder if an untapped source might be any old superintendents records that are different from the main records of the clubs, or maybe even suppliers, like Toro, or irrigation designers, etc. to figure out when they did certain things to the course without an architect.
The point it, research now is easier than ever. But with more stuff, the job of tying it together becomes more difficult, too.