Not enough
Shimrod,
Jim Carroll ,is a collector of folk songs,he is not an authority on anything,anymore than anyone else on this forum.
Many other people have collected folk songs,Peter Kennedy, Mike Yates,John Howson, Sam Richards.Mick Haywood etc
just because someone is a collector,it does not make them an authority on what is a folk song.
Jim Carroll is entitled to his opinions,his information about Walter Pardon is interesting,but he is not god.