Funny, I was trying to explain this to my 16 yo grandson the other day. Do you have links to info I can give him?
I would just stick with the original sources. Since Ritson did this so long ago, you really have to dig far back to get to the real Robin Hood.
The Child Ballads 118-154 are mostly Robin Hood, but there are probably others in the list:
http://www.sacred-texts.com/neu/eng/child/index.htm
Surprisingly enough, Wikipedia’s page for Ritson does accurately portray both Ritson’s history revisionism, as well as his motivation for it.(Jacobinism)
http://en.wikipedia.org/wiki/Joseph_Ritson
One of the links in my original posting goes to an old book which does not appear to have the Ritson poison in it.
http://books.google.com/books?id=JDRYAAAAcAAJ&pg=PA17
Good luck with correcting that.