Tom,
If you recall, we have spoken to a great extent about what we believe to be the work done at Seminole. I think what Mark is doing is very helpful in getting to the bottom of the architectural history of the course.
As you know, I had a quite a long phone conversation with Robert von Hagge about 6-8 months before he died. The entire conversation was about the work done at Seminole by Dick Wilson because RvH was Dick Wilson's associate at the time and was the one doing the work with DW at Seminole.
In that conversation, he explained that other than the 18th, no other greens were touched by DW other than to re-grass them as they had been neglected during the war. The explanation for not touching the greens was that Chris Dunphy said they were "sacrosanct" and not to be touched. After looking at aerials, I am of the belief that the work of DW at Seminole other than the 18th, has been greatly exaggerated.
So, if the 3rd green was moved, I would have to guess that it happened after DW's involvement at Seminole.