I visited the California State Library History Room on Wednesday. They have a complete run of Round Robin, as well as some other works of N. Meade Layne, which I was able to look through.
More in line with the circle, though--on the circumference, I guess--they had some manuscript material from George Haas, as well as a copy of Don Herron's book. Currently, I am working up a post on it.
Photo from Marcin Wichary
