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, as used at Quality Comics, was a house name used for multiple writers. It is not the UK writer John Charles who started his career in the 1990s.
Noel Fowler is a by-line and not the name of an actual person.
Script credit suggested the Who's Who40-43).
strip reprints
All Gustavson credits verified and courtesy of Terry Gustafson, son of Paul Gustavson.
dream story
Fox explains that Poison Ivy strip had to be cut to one page, and has P.I. fight himself.