We see the late 40's and current version. For the record, earlier photos and maps in the CH show an abundance of sand. In fact, to use one hole as an example, the ninth was a sea of sand in the early days. So, the obvious question is whether the changes from the earliest design to that shown in the 40's were supervised by DR or were in-house?
Also, there are many old bunkers that are grassed over throughout the course that are not shown on the 40's version. Another example is two fwy bunkers about 100 yds short and right of #8 green. Restored, they would provide some consideration for lay-ups on the short 5 par (4par in tournaments) and, even better, create a terrific visual balance with the two ferociously deep, left greenside bunkers.
The 7th is almost entirely new, as the lengthened 8th hole made the original 7th green unsafe. The green was moved to the north and slightly west. In the current/latest photo, 4 evergreens are planted at the old green's location. The pond was added in two parts. First, it was small and located near the dogleg's bend. It was enlarged by Rees to it's present size.
Agree with many that there are too many bunkers. In fact, with the obscene distances now on the tour, most of the short bunkers can go.
Tom, you r invited any time to visit, play and enjoy the archives before/after.