No, I dont doubt it is a Flynn green.
I think it was a strange Macdonald Redan if he built it without a kick mound, and such a shallow front bunker. I mean, the "wall" at North Berwick would still be fresh in his mind, so why would he be timid at Shinnecock?
Honestly, my questions have little to do with Flynn. Rather, I am trying to "see" the old hole built by Macdonald.
I am home now, you probably sent the drawings to my office email, thanks!