Chris,
I don't know if you found this out before me or not, but it was about 10 years ago that I visited with Beach Grove's then-superintendent, Randy Hooper, who lent me a binder filled with historical info. he'd put together about the club and course.
Growing up in Windsor, Ontario, I'd long heard that Beach Grove was a Stanley Thompson design. But, the course is so mediocre and the routing so bad - well, it's an odd shaped tract to begin with - that as I learned more about golf course design, I began to instinctively question this fact.
I was stunned when I discovered captions from minutes of a Board of Directors meeting about 1919 or '20, in Randy's binder, that clearly tells Devereux Emmett "laid out" the Beach Grove course. I don't know if this was a "mail-in job" or not, but I certainly suspect it was. (And, I'm still wondering how the powers-that-be at Beach Grove came to ask Emmett, of all people, for a routing plan?)
At the time of this "discovery", Beach Grove was heading into a bunker renovation project that was being labelled a "Stanley Thompson restoration" or sorts. Funny, I'll never forget Randy saying, we're probably better off keeping this quiet.