As has been stated elsewhere, Travis was writing about "strategically applied" principles in the bunkering of courses, and in opposition to "steep cops with narrow ditches which disfigure so many courses", as early as 1901-02, and the "increased length and the addition of several new hazards"at Garden City Golf Club in preparation for the 1900 U.S. Amateur. Though, his 1920 article suggests that changes at GCGC started in 1906, I believe that he could have pointed out that he was an advocate and agent for change from the beginning of his tenure as Garden City Golf Club's Green Chairman, and perhaps even before. After the 1901 U.S. Amateur at Atlantic City, Travis went home to GCGC urging additional lengthening of the course.
The point I'm trying to make is that, like Oakmont and, probably, other courses, GCGC's greatness as a course did not all of a sudden appear in 1906 or 1908, though it received national attention in 1908 There were improvements to the course that began very early (perhaps using "scientifically applied" principles, iif Travis had anything to do with them.) Were those principles applied to the changes made for the 1900 U.S. Amateur?