Eckstein,
I've been researching Park for over a year in my efforts to put together a master plan for the PSU White Course.
An "alright" start would be the book, "The Parks of Musselburgh" by Douglas Adams. The scanned image of Park's business card from 1922 is from that book.
I've also found "The Maidstone Links" which is the club history of the Maidstone Club to be very helpful.
From my own research:
Park may full well be the first "God" of Golf Architecture. His early work at Sunningdale and Huntercombe (a project in which he had a heavy investment) is widely considered to be the seminal design influence on inland golf courses.
Park was a golf professional first, and literally wrote the book on putting. Some consider him to be the most dominant golfer of his time and he has two British Opens to his credit. He first came to America on a barnstorming tour in the early 20th century and ended up doing a lot of design work as well - I believe Olympia Fields may have been built at this time, Jeff Goldman can provide a deeper insight into the timeline for that.
At this point he considered himself past his prime playing wise and turned to design full time.
In the late 1910s, he permanently moved to America and set up an office in New York City. It was during this time that he designed and built such clubs as Castine Golf Club in Maine, Mt. Bruno Golf Club in Montreal, Maidstone, The College Golf Course for Penn State (which is 9 holes of the White Course), Philmont Country Club, Greate Bay Golf Club (then Ocean City Country Club), 13 holes at Atlantic City Country Club, Glen Ridge Country Club in Glen Ridge, NJ and Berkshire Country Club in Reading, PA.
Here's the business card again:
By 1925, Park began suffering from what may have been a advanced case of Alzheimer's (he'd return to job sites already completed or forget about courses he had designed altogether). As such, his brother Mungo Park took him back to Musselburgh and returned to the US to finish all started projects (of which Philmont, Maidstone and PSU White could be).