Jean Martin
J B Martin ran coupla C206s out of Erume and surrounding strips. As you said he was a lay Catholic missionary in earlier times. I think MJB was his original, which came to greif near Wau, but was salvaged and rebuilt subsequently. Paul Johnson was killed in the other between Kosipe and Tapini in the other after it became Elomair. I think Dave McDonald was Jean Martin's partner in the later venture. Are you all sure the marker on Mt Yule isn't a trig station!