Jim:
Automobile Club of Detroit changed its name to Pine Lake around 1921.
Here are a couple of articles touching on Park's work in the cities noted in the Happy Valley writeup (which was the focus of my question), all forwarded by Jim.
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I've updated the list to note in bold the courses we can confirm he worked on in 1916.
Baltimore -
Rolling Road (although his work is given a date of 1920)
Detroit (5 courses) -
Meadowbrook,
Pine Lake (aka Automobile Club), Cascade Hills?,
Flint,
Red RunMinneapolis -
Minneapolis GCNew Britain - this would be
Shuttle MeadowMeridian - a 9 hole course in Meridian, LA was organized in 1917
Plottsville (Pottsville?) -
Schuykill CC (work is given a date of 1921)
Reidsville - assuming this is the town in NC, which didn't get a course until 1931
Boston - this is the Canton course,
Milton-Hoosick His work at North Jersey is a new one to me. Also, the second article confirms Drew's questions on Sylvania, and adds in his doing work at the Toledo CC around the same time.