"there are a lot of courses that have built routed and built with the ''Architect'' on site for only 2 days."
Phillippe:
Sure there are. In the 19th and early 20th centuries there were numerous professional architects who routed courses in a single day (generally that's what was referred to back then as "Eighteen Stakes on a Sunday Afternoon" but that architect certainly could have done the designing of the man-made features and applied features such as bunkers and green designs and such in a single day.
Matter of fact, that was just about precisely what made Macdonald himself declare that the early architecture in American "Made the very soul of golf shriek" and according to him motivated him to go about GCA in about the polar opposite way which took a good deal of time, certainly a good deal more than a day or two.
So sure there were lots of courses that were routed in a single day (at best a stick routing) but none by Charles Blair Macdonald, that's for sure.
It's pretty important too when one considers why it was virtually impossible for Macdonald to route and design a golf course in a single day (all the time he had available to him at Merion East with a topo survey map around) even if they asked him to which of course there isn't a scintilla of evidence they ever did is the fact that Macdonald never did a routing and design drawing. Basically Raynor did that kind of thing for him.
Somehow when one considers that the Wilson Committee did numerous different courses and plans throughout the winter and spring of 1911, I really don't see him asking them to throw them all aside and follow him around in a single day while he routed and designed a whole knew plan for Merion East. Do you?
I can just see Richard Francis, the Merion member and professional surveyor/engineer who probably did the drawings for the Wilson Committee rushing around behind Macdonald trying to draw it all on a survey map;
"Charlie, wait a minute I haven't finished drawing the 12th hole yet, which way does it go and what were the bunker arrangements and green design?"
And, Charlie yelling back at him: "Forget it Dick(head), we're on the 13th now and there isn't that much light left for me to get all the way to 18, much less tell you how to fix the problems with the land around 15 green and 16 tee so you can create that stupid story about your brain-fart idea requiring a late night bike ride over to the "Hor" Lloyd's house."