Edwin -
Tom Doak and others might know more than I, so subject to their corrections, here goes:
MacK prepared at least two routings for ANGC. The first in 1931. I say "at least" because I recall that there is a third (and final) routing which now hangs in the offices of an Atlanta law firm. They reflect some interesting changes in how he thought through different design problems. For example, I think some of the later holes on the current back nine were originally conceived with a different par.
MacKenzie also did separate drawings for each green and its surrounds. The drawings are remarkable, giving exact details as to contour, bunkers, mounds, etc. out to about 25 or 50 yards from each green. A copy of this pamphlet recently came on the market. The USGA archives has its own copy. Per MacK's famous map of TOC, he could be very detail oriented when he wanted to be. If you want to know what Mack was up to at ANGC, these green sketches are eye-openers. I suspect these were prepared for construction purposes.
I won't go into the extensive photographic evidence about the early course, but something very close to MacK's routings and green construction drawings was built.
Finally, MacK wrote a great deal about specific features and specific holes at ANGC. For example, his commentary in the first Masters program went hole by hole and is great stuff.
Of course Ron Whitten says MacK didn't have much to to with the design of ANGC and that the Fazio changes are just awesome. And Forrest thinks he can improve any design. So let's not worry too much about what the greatest architect ever might have thought about at ANGC. There are lots of folks around today who think they know better.
Bob