John,
If 14 holes from the 1915 course are found among the current Upper and Lower courses at Baltusrol, I am mistaken in its history. Still, the work was not done in response to an Open being awarded and thus would not represent the first case of Open doctoring. However, it is news to me that Tillinghast incorporated so much of the original holes in his designs.
While I am not a fan of the Lower course, I did enjoy the Upper quite a bit. I would be interested in borrowing the history book. I can mail it back to you or you are welcome to pick up the book on a golf visit. I don't worry about access requests. Who do you think I am, Tom Paul? I don't got no stinkin' access...outside of my home course that is.