Willie,
Conceptually, Crump understood the need for an internal feature to distinguish/differentiate a good shot from a marginal shot on that rather large, punchbowl like green, which happens to be the 18th and final green.
The internal feature, be it a mound or spine is the structure that serves to function as the differentiator.
Crump conceptualized, designed and built that mound in the 18th green.
And more importantly, that mound remained in that green from the day it was built, for years, for the remainder of Crump's life.
If it was so objectionable to him, as other self proclaimed experts claim, why didn't he remove it ?
It wasn't like Crump was too busy doing other things. Things like business ventures or raising a family.
His SOLE pursuit was that golf course to the exclusion of everything else.
He spent almost every waking hour ON SITE.
And from the time he conceptualized, designed and built the mound in the 18th green, it remained an integral feature of the 18th green until and after the day he died.
As to the writings of one other, that the configuration of the internal feature might have been temporary, four to five or more years or a lifetime doesn't sound temporary to me. In addition, what may have been temporary was the configuration of the feature. The concept was PERMANENT, and that's what others, including self-proclaimed experts fail to grasp. Crump ALWAYS intended to have an internal feature to function as the differentiator on that green. What others, including self proclaimed experts, haven't considered, is that any reference to the mound being temporary, may have been directed to it's dimensions, and not the concept of differentiation, which was permanent.
Anyone with a brain, and even some without a brain, should be able to recognize that Crump understood the vital need for a differentiator as an internal feature within that green.
If one examines the second hole, Crump's favorite hole, and in particular, the green, you can see how he used contour to serve as his differentiator. His intent was to use contour, in the form of a convex feature, as the differentiator on # 18.
And, he succeeded by incorporating a mound as the internal feature.
He repeated that process/function with the configuration of the 3rd green.
And again on other greens, such as # 12.
As it stands today, the large, punchbowl like 18th green desperately needs the "differentiator" returned as an internal feature.