Tom
Trost's Nov 27 1931 is very clear that Mackenzie would be designing a second pitch and putt course probably at the other end of the beach to the existing one. So I am almost certain Mac was not involved in the first one as Trost says its designers basically had no golf knowledge. The plan of Jones Beach you posted with the arrows showing the various components, appears to be missing its right half - do you have the entire plan?
Mike
Yes, the bunkering displays some sophistication which is why I surmised that the one by the water tower might have been the one Mac designed. If it is indeed the Burbeck one, as Phil Young contends, then clearly there must have been some inspiration there. Perhaps he took a look around the Lido.