Seymour Dunn did the orginal 9 holes at Chautaqua Golf Club in 1910. These holes were redesigned by Donald Ross and 9 holes added in 1921, the Dunn holes were part of what is now the Lake Course.
The one hole that jumped out at me that is not Ross and for sure created by Dunn is the 11th. This hole is a shorter par 4 with an elevated green tucked into a hillside. The green has two tiers and slopes from back to front, is oriented/turned on an angle with respect to the fairway and fronted by a deep bunker. Wonderfull hole and definetly a Dunn hole.