Tom
Your reference to rule 28a is characteristically kind and thoughtful, but in this particular case, tragically misguided.
In the actual incident to which I was imaginating, the ball reached the base of that bush after a stroke from an embedded lie in the unmaintained face of that bunker. The hapless player tried to hack his ball out with his rut iron (he WAS lucky to be playing in a "hickory" competition!), but unfortunately his club hit not only the ball but the business end of an old shovel inadvertently left there 20+ years ago--the last time "Hook" Williams re-sodded the area. The ball hit the shovel face, bounded back over his head (clipping his deerstalker in the process and adding yet another 2 strokes to his score) then landed in the unplayable place we are discussing. So, as far as I can see, from a strict reading of the rules, if the player wished to invoke Rule 28a, he would have to replace the ball in an embedded lie on top of the rusted shovel head (as I understand it, after 20 years, such buried objects become "integral parts of the course" under The Tufts Bible's 4th Law of Golf--"Whenever in doubt, screw the player!").
So....28a was not really an option, and the poor chap had to find relief somewhere both in the bunker and either 2 clubs length no closer to the hole, or behind the point where the ball lay (but still in the bunker) in line with the flag. As it turned out, the player chose the only feasible course of action which was to not attempt relief, but rather wade into that bush (a gnarly old bramble) and hack away at his ball until it was propelled to a safer place. It took him seven goes to do so, and all was well afterwards, save the fact that he, a young man of prominent family and great prospects, sadly was never able to have children and carry on his line..........