Yesterday I asked about a timeline for Willie Dunn, Jr for the following reason. Also yesterday I found a Jan, 1918 article penned by Chick Evans from a recent meeting he had with Dunn. Part of the headline ("... builder of 900 courses...") grabbed my attention. But perhaps Mr. Evans really meant to say 9.0 x 10exp1.
In the 2nd paragraph Evans states that Dunn laid out the Shinnecock Hills golf course, which I believe is well documented. The real head-scratcher is that Evans in the last paragraph says "Willie Dunn had laid out over 900 courses, among them being the Merion course, where the last national championship was played". For those of you still new to the early US Amateur history, it was Evans that won this tourney at Merion (where both the East and West course were used for the qualifying rounds).
Early in the article it sounds like Dunn spent a good amount of time in France, perhaps from 1908ish until right around 1918. Hence, him being involved in any fashion with Merion East or West seems unlikely.
In my first post on this thread was an 1896 article from the Philly Inquirer that says a "Willie Dunn, the champion golfer" had done work on the original Philly Country Club course. I believe the first nine holes of the original Merion Cricket Club course was done by Willie Campbell, but perhaps it was Dunn that did the second nine. But I really don't know right now. But that would be the simple explanation for the confusion on the part of Evans.