Bill:
All of these Maxwell photos were taken right about the same time, and possibly all during a short time period (just after the 10th hole was redone). If we start collecting all of the photos taken during that time and posting them here, we'll have a pretty good idea of whether or not those left side bunkers ever existed.
Neil:
I think if you look closely at the 2nd photo in your last post, you'll see that the right side bunker is still actually two separate bunkers, its just hard to make out the thin strip dividing them.
To start the investigation, here are a few more photos from other threads. I have three more photos that I'll try to get uploaded later today:
MacKenzie original (gives you a good idea of the contours at the end of the Mac Bunker):
Maxwell era:
Early Postcard:
1950: