GUEST,Guest, There's a Pocatello River in West Virginia.

Hi, cnd. I don't know if this is of any use, but the fiddle tune in your fist link (titled link) shows on the following YT page as 'Poca River Blues' by Fiddlin' Billy Hurt. So I'm guessing there's a spelling mix up in one or tother.

https://www.youtube.com/watch?v=hQ_85EKJ4i0