Seeing as you're now backtracking to a stance that the "elements were all there," I think you should pay heed to how this conversation started. Namely that a third party made an offline claim that the Oakmont Church Pews were an inspiration to Crump in some of the early work done at Pine Valley.
I'm willing to humor the assumption that the chain of bunkers that existed were moderately (this being a strong qualifer) close in form and function to what was eventually put in place prior to the 1935 US Open, if you'll concede that there is no way Crump could have borrowed the Church Pews concept from Oakmont, as it was built well after his death.
Sven
Sven,
To be honest, I do think we're splitting hairs here a bit. I think the Lurker suggested that Crump could have borrowed the Church Pews concept from Oakmont by simply referencing the rows of multiple bunkers in line on both sides of the 2nd hole at PV. Like the early Oakmont, they aren't a single bunker but instead a long straight row of multiple bunkers as seen on this aerial.
I do think these bunkers look remarkably similar to bunkering seen in the 1925 Oakmont aerial and the 1919 drawing (seemingly dated either 1915 or 1916) shows them to be in place at Oakmont back then, during Crump's lifetime and during his development of the course if my eyes aren't deceiving me.
Once again, I do understand your distinction of it being a single bunker with multiple rows, but think what people call "Church Pews" at Pine Valley today is simply a related, less formal concept.
**EDIT** Sven, thanks for that 1938 aerial and I agree that the multiple bunkers in that spot were formalized into a single bunker by that date but I'm still wondering how anyone knows that this didn't already happen by say, 1927?
As far as the photo showing both the Church Pews bunker with other "in line" bunkers on the other side of the fairway, it seems to me that the sandy parts were simply widened and connected into a single entity and I think that's fascinating on multiple levels. That's why I'm asking the questions trying to see if there is any record of when and why it happened.
Also, the changes to 15, 16, et.al. were referenced earlier by Jim Kennedy from articles and it's nice to see the exactness of the changes in that newsletter.
Thanks!