I'm trying to find some info on a Tracy Kenpo guy from the 1960s and 1970s or so (I believe, anyway). His name is Rodney Hard. I believe he wrote a book (unpublished) about sparring principles, based on information he learned from Joe Lewis. I believe he also has a background in Korean arts, Hapkido specifically, tho perhaps others as well. Anybody know anything about him? thanks!