Who knows what the first golf course was that was comprehensively seeded or what we know today as "grown in?" When and where did that begin to happen and why? ....
TE - interesting question. I've wondered out loud before about how conscious an awareness there was of the principles of good golf course architecture before 1900. Yes, judging from the results of those early 1900 polls, the experts of the day had a pretty clear idea about what consitituted the world's great golf holes, and they articulated those ideas well. But those golf holes were all on British links courses, where the hand of man had merely 'enhanced' what nature had provided, and more importantly had simply taken the great-grass-for-golf itself as a pure gift.
How would have an awareness of the principles of good golf architecture changed/deepened/gotten clarified when architects first began to a) really move earth around and b) more importantly, first learned how to GROW the good-grass-for-golf on the land they just moved?
You mention Sunningdale as a possible candidate for the first 'grow-in'. Does it manifest the principles of good golf course architecture in a more 'conscious' way?
Peter