Tom,
Richard does what he can to deduce what the original Vardon and later Colt courses may have been like. Colt's routing was pretty well the same as today's course, so it would seem that he laid the foundation of the course, Hotchkin refining it over time. There are no extant maps of the Vardon or Colt courses, but, from surviving photographs, even some of Vardon's work is still visible today.