Bill, TEPaul, Tom MacWood, et. al.,
One of the difficulties in uncovering the "complete" architectural history of any course lies in the fact that many times a superintendent or a chairman/committee simply made changes that were not documented, and with time, were accepted as always having been part of the course, when in fact, they were amendments to the course.
I've seen that occur time and time again.
And, as the members who were present during the alteration, resign, retire or die, the changes become more obscure and attributed more to having always been part of the golf course.
Thus, it's almost always a frustrating pursuit, a search for the Holy Grail of sorts.
While Green Committee and Board minutes can be revealing, often times those minutes are sanitized or don't chronicle ad hoc changes.
Aerial photography, coupled with Green Committee/Board minutes can be invaluable, but, they're not always all encompassing when it comes to detailing alterations.
While I applaud thorough research, thorough research often doesn't uncover specific changes, who made them and why they were made, so I think you have to look at even the most successful research project as only telling 90 % to 95
% of the story on these old courses.
A modern day version of my "words of caution" might be Sebonack and Atlantic where detailed books were written to chronicle the concept, creation, construction and completion of the golf course. Yet, as thorough as these terrific books are, they're not 100 % inclusive of all the facts.
While chronilogical aerial photography can identify changes/alterations, attribution and motive is often far more difficult to uncover, no matter how good the research effort.