Dunlop:
Amazing website you have---Wow! Thanks. I owe you a phone call. Sorry, I haven't been around much.
Bradley:
I really don't know who it was (some "amateur/sportsman/gentleman" architect or someone else
) or even when or where the significantly "flashed sand" bunkering first originated but I sure would like to know.
I do think the answers are beginning to get pretty well nailed down though. I've been very interested in this question for years primarily from my discussions about it with Ron Prichard. He has long had some most interesting theories about this (and closely related matters) and as time goes on it seems like many of the things he has said about it are now becoming pretty well documented and dated.
To me it is beginning to look like the coming together at the same time of a number of factors in the evolution of golf architecture and golf including aesthetics (LA), playability and developing and improving golf balls and equipment, developing and improving construction and maintenance practices and machinery, developing golf agronomy and perhaps even the development and evolution of the Rules of Golf and the game itself. I sort of hate to use the analogy but it seems something like what is sometimes referred to as "The Perfect Storm!"
Not to even mention that at the time it seemed to happen, the popularity of the game was totally exploding and people were coming into it who may've been asking questions and seeking answers that had never really been answered or even asked before! And it may even be that just preceding or even precipitating all this was the first on-set into golf and architecture (perhaps around the mid to late 1890s) of what we might even call the golf and golf architecture "PHILOSOPHERS."
I think this time----eg perhaps from around the mid 1890s into the 1920s a whole lot of people were really beginning to try to sort out a whole lot of things that had never been sorted out before!
As an historical sidebar, I also think the man who probably saw himself as the true transporter of the game to America from abroad was beginning to get buffeted around in the turbulence and in the end it effected him mightily and probably not in some of the ways that were to his liking in the end.