In the summer of 1935, A.W. Tillinghast commenced a tour of the country's golf courses as a consulting golf course architect for the P.G.A. of America. Tilly was hired by his good friend George Jacobus, who was president of the P.G.A. and Head Golf Professional at Ridgewood Country Club in New Jersey.

Tilly's services were provided free of charge and only to golf courses and clubs where P.G.A. members were employed. Tilly visited over 500 golf courses through the summer of 1937 and made two complete coast to coast loops of the country. He has generally been credited with the elimination of thousands of sandtraps, which he called "Duffer Headaches," or DHs for short. Tilly's DHs included bunkers and other hazards that hindered the high handicap and were generally found inside of 140 yards of the teeing ground. On many courses he advocated their removal to help the high handicap and reduce the costs of course maintenance. During his consulting tour he wrote, "It is a matter of record that I have condemned nearly eight thousand sand traps."

Few however, are aware that Tilly's consulted on much more than bunker removal. He made significant design recommendations to several hundred of the golf courses he examined. Tilly reported back to George Jacobus on a daily basis by letter summarizing his detailed recommendations. What follows are the copies of Tilly's letters to Jacobus in a translated form with copy of the actual letter attached in pdf format.