A YouTube user named Dawn Cantrell has uploaded several great videos of old-time fiddle tunes on mandolin and guitar. These include Julianne Johnson, Rock the Cradle Joe, Dry and Dusty, Seneca Square Dance, Red Apple Rag, Twin Sisters, Big Sciota, Fly Around My Pretty Little Miss/Angelina Baker, Liza Jane and many more. It's fun to play along with these. Here's the video for Julianne Johnson:
The mandolin (or mandola?) player does a nice little turnaround at the end of the B-part worth figuring out.