Jim Sullivan,
A good number of early photos seem to indicate that PV was a hostile site, not an ideal site, unless you consider swampland ideal.
When Bill Coore was kind enough to attend one of my GCA.com get togethers, I asked him how he found the holes at Hidden Creek.
He responded by saying that he walked the property incessantly, until it felt like golf.
While I can't say for certain, I doubt Crump had Bill Coore's inate, experienced or learned talent.
And, the property at PV seemed far more hostile than the property at HC.
With such dramatic elevation changes and such difficult terrain, it seemed to me that an individual with no prior design experience, traipsing about thick woodlands and swamps, would be hard pressed to envision those holes. It seemed more likely that topos were a primary tool in discovering the holes and routing.
I was hoping that a 1910 topo of the area that includes PV might be available from the railroads or other sources.
If so, I was hoping to compare that topo with the "Red" and "Blue" topo.
One of the tangential or even primary reasons for doing this was to discover exactly how much of PV was manufactured.
It's hard to believe that the 1st green was a natural land form.
The same applies to many tees and some greens,
When you walk backwards, from behind # 18 green to # 1 tee at NGLA, you can see a good deal of the manufacturing.
Perhaps the same is evident at PV, such that, personal inspection, along with topo analysis, would enable you to understand how the course was built. Where it was natural and where it was manufactured.
Hope that helps.