Lin,

It's not clear what pages on the Mariposa web site are the subject of your question. There are some very brief historic sketches on pages such as https://mariposafolk.com/our-stories/strange-brew-85-90/, and there are links to a York University web site which seems to go only as late as 1981. Those list so few performers that I can't imagine you'd think the list was complete.

If you can give us Mudcatters some more specific links, then perhaps one of us can look at the pages, write "I'm sure that's incomplete", and provide an example of a missing name. That won't be the answer you want, but it may at least support your suspicion that what you want isn't on the web already.