Greg, the original Irving Park Cs. was designed around 1909 occuping only the block around the clubhouse with 9 holes. Ross began his work at GCC in 1924 remodeling the holes around the clubhouse and adding new holes 2, 9 thru 11. He built holes 3 thru 8 in 1927 which included the only internal housing track between holes 5,6 & 7. All of the drawings were done in 1924.
Sedgefield was designed in 1924 and opened in 1926. Early in the design phase the concept of adding a housing component was introduced which forced changes to the original routing that Ross intended to use. As a result, several of the best holes on the course were created to make room for the streets and housing lots. As a matter of fact, the more unorthodox holes like 2,4 and 11 with their severely sloping fairways came from this change. I discovered sketches on the back of the field drawings for these holes showing his original idea.