The listing of courses done by Egan on p. 4 of the article provides a bit to chew on.
I stumbled across the article while looking for anything covering Egan's work at Tuxedo Park. I've only seen one other reference to his involvement there, and the timing of the work in 1935 leads one to wonder if it was completed prior to his passing in 1936.
There are a number of courses on the list in the article that seemingly are included due to Egan's association with Mackenzie. Namely, Harding Park, Pasatiempo, Valley Club, Crystal Downs and Augusta National. I have not seen anything noting Egan was personally involved with any of these projects. In addition, I am curious as to what course is being referred to by Rio Campo.
There are a few additions to the list that should be included:
1909 - Louisville CC (Louisville, KY)
1916 - Boise CC (Boise, ID)
1926 - Monterrey Peninsula CC (Dunes) (Pebble Beach, CA)
1930 - Alderwood CC (Portland, OR)
1930 - Sequoyah CC (Oakland, CA)
1931 - Sharp Park GC (Pacifica, CA)
1932 - Medford Public GC (Medford, OR)
1933 - Bayside Municipal GC (Bayside, CA)
And one that I still have questions on:
Multonomah GC (Portland, OR)