David,
What do you think CBM thought the principle of the Redan was? In the article, he says "the principle of the Redan can be used wherever a long narrow tableland can be found or made", and shortly after in describing NGLA, "The essential part, the tilted tableland". Do you suppose that the tilted tableland for the green complex was the essential component of the principle he had in mind? Do you think the bunkers, front and rear, and the ridge hiding the green, were not part of the principle? How could he have looked at Merion, for instance, and seen that principle evoked, since it appears from all descriptions, that that hole does not have tilted table land in the sense of NB or even in reverse?