Sorry, for Southern Folklore Collection read Southern Folklife Collection in the above post. It is hosted at the University of North Carolina (UNC) (?at Chapel Hill). I am not sure how the Wilgus Collection ended up there, others may know...

Interstingly, if I search the UCLA Ethnomusicology Archive, https://archive.org/details/uclaethnomusicologyarchive , where the present Wikipedia article on Wilgus says his collection resides, I could not find anything...

Anyway if anyone cares to delve into what is on the tapes at UNC, perhaps they may like to report back!

Regards - Tony