Tom,
"What differentiates a Sahara bunker from a HHA bunker?" The answer lay in my post #16 which defines each type and in 16 & 27 where examples of both are seen. I think the differences are striking and should be obvious.
In post #27, the "HHA" at the 5 Farms is typical in that it bisects the fairway completely creating two distinct sections before and after and is a combination of small sand bunkers with large surrounding rough and long grasses. The typical "Sahara" bunker does not bisect the fairway but rather runs alongside it and, in addition to its size, impacts into it as can be seen in the photos of Bethpage 5 & 7. Yet the main difference isn't the bisecting of the fairway as there are some "Sahara's" that do this. This can be seen in post #27 in the photo of 17 on Baltusrol Lower which bisects the fairway including the much smaller bunker in the rough to its left. So what then is the defining difference? Even though there are a very few small little tufts of high grasses within its body, the hazard is 98%+ sand. A "HHA" is a mixture that contains a great deal of rough with islands of sand, not the other way around as is the case at Baltusrol. That is why the bunker has been called "Sahara" going back to the day the course opened for play.
"Did Tilly ever refer to any of his great hazards as HHA or Saraha? I believe you said Tilly named the bunker at Baltimore HHA. How do you know that?"
Yes he did. I've already mentioned the "HHA" at 5 Farms. Tilly named every hole there and its in the club records. You can see the hole names if you visit the Tillinghast Association website at
www.tillinghast.net and go through the 5 Farms slideshow. Before you ask, NO, I won't produce copies of them on here. Sometimes you simply do need to actually believe someone. As a great black-caped philosopher said in a galaxy far, far away, "I find your lack of faith disturbing."
Tilly named a great many of his holes on many different courses. With the EXCEPTION of "Hell's Half Acre" I am unaware of his giving a NAME to any of his bunkers other than refering to them as a type. This doesn't mean that he didn't, just that I have yet to see any. There is enough secondary evidence to believe that he did call the bunker on 17 at baltusrol Lower Sahara; I just don't have the absolute proof. As I mentioned above, it has been refered to as a "Sahara" bunker since the copurse opened.
The real question actually, is where and when did Tilly begin using the term "Hell's Half Acre?" Why did a number of 1920s-30s golf writers (e.g. - Grantland Rice, etc...) call it a SAHARA bunker? That's a question for a different time and day and you can read about it in Volume II when it comes out...