 Historian Kevin Brownlow (qv) has expressed doubt concerning  Fireworks Wilson (qv), whom Karl Brown (I) (qv), the assistant  cameraman, named as the special effects man in interviews.  Brownlows doubt is caused by the fact that there are no references  to Wilson in any other accounts from any period, and he has  suggested that Brown may have invented the name since he could not  recall the name of the films documented special effects supervisor,  Walter Hoffman (I) (qv).