You couldn't cram 18 holes into this property.
Good point about cramming in 18, but back when Ross was hired clubs would get a top designer even if they only had plans for 9. Going over the Ross catalog, I lost count of 9 hole designs around 40. How many has Doak done? I think it's around 0, and if not that exactly, I'm sure it rounds to that. What percentage of designs by Nicklaus, Fazio, or Rees Jones (or Hills, or Brauer, or any modern architect, except maybe Randy Thompson down below the Tropic of Capricorn) are 9 holers?
My point about cramming in 18 is about the modern need for 18, not the appropriate use of a small parcel for 9 in the Golden Age.
The lost art of the 9-holer is a shame. it's unfortunate that there aren't more opportunities to design 9-hole courses, as a good, local club can function well around 9 holes.