Maxwell was a house name used by Quality Comics on some of its features. It was also a pen name for artist Lou Fine.
John Charles is a by-line and not the name of an actual person.
Noel Fowler is a by-line and not the name of an actual person.
Script credit suggested the Who's Who40-43).
All Gustavson credits verified and courtesy of Terry Gustafson, son of Paul Gustavson.
Fox explains that Poison Ivy strip had to be cut to one page, and has P.I. fight himself.