Nice call, Dave. I'm told that the course is essentially where the American Airlines terminal (No. 2? I can't remember) is at O'Hare. Next to the golf course was a small airport called Douglas Field, where Douglas Aircraft had a plant. It was expanded during World War II and eventually renamed Orchard Field, after the course and the hamlet at Higgins and Mannheim (where Rosemont is now). Which, of course, explains the ORD.
To top it off, Ridgemoor, a few miles due east of O'Hare's southern east-west runway, was given the Langford and Moreau treatment in their heyday.
I have seen reference on a map, but have not confirmed, that the Twin Orchard had 27 holes at one time. Any ideas on that?