Jim and Neil, on page 25 of "The Course Beautiful" on the Winged Foot drawing by Tillie, doesn't it seem he uses a dark broad line to indicate where he wants turfed banks or slopes? I see that he really has two styles of bunkers fro picutres of WF courses; the flashed-up sand, usually with a tongue or grass ramp, and the more flatish with turfed bank. I think it depends on the elevation up to a green.
In this case of lightening, maybe he did have it flashed too high as Neil describes that the sand was removed prior to 1929 and the fairway bunker taken out in 1930. Of the bunkers I do find in various books showing Tillie's work, it seems the flashed up ones, have more of a retaining upper lip and are graded to channel drainage around them. If he had tried to flash the one up as the first picture on this thread painted in with sand by Neil, any rain would have washed right down disasterously. Even if he only had it flashed up about 1/2 way up the slope to the green, it looks like it would have been a drianage nightmare. Maybe that was what prompted him to remove the sand in the first place. I really think it could be as great a hole or even greater with a flat bunker meandering along the bottom of what is now the grass pit. But obviously, from the Love and Leonard's comments offered above, it is darn good as a grass bunker.
I am just curious as to what the rest of you all thing would be or is the best design here. Do you like the first painted in by Neil as flashed all the way up the bank. Do you like it as a turf bunker? Or would you like to see a flatish bunker with turfed bank? I'm voting for the last...