George
In 1917 CBM said Raynor had been involved in 50 to 60 projects, and Raynor himself claims to have built 60 courses in 1917. This the timeline I have come up with. Are there other courses you would add?
1908 - NGLA
1909 -
1910 -
1911 - Sleepy Hollow, Piping Rock
1912 - St. Louis, Greenbriar
1913 -
1914 - Lido
1915 - Islip, CC of Fairfield, Westhampton, North Shore, Maidstone, Nassau
1916 - Blind Brook, Shinnecock Hills, Greenwich, Mountain Lake, Sunningdale, Morris County
1917 - Chicago, Shoreacres, Oakland, Olympic, Hollywood, Gardiners Bay, Bellport
He was involved with Findlay Douglas at Blind Brook, Alex Pirie at Sunningdale, HH Barker at Westhampton, C. Wheaton Vaughan at Maidstone and Robert White at Islip & North Shore. Islip and Olympic were never built, and I'm not sure what the story is with Gardiners Bay and Bellport. I don't think it is out of the question he collaborated with others, especially in Maine. In fact IMO it is the only reasonable explanation for the significant gap you have.