Here an article from laphamsquarterly about Chicago billiard 1928. I don't know if been posted.
http://www.laphamsquarterly.org/voices-in-time/norman-maclean-learns-from-the-master.php?page=1
http://www.laphamsquarterly.org/voices-in-time/norman-maclean-learns-from-the-master.php?page=1