Viola Ruth
1910-1964
Viola Ruth lived in Arizona for the first half of the 20th century. She was an important dance fiddler and long-time state fiddle champion. She published a number of tune collections showing her style of playing, and left copies of them plus her music notebooks to the state historical museum, who have put images of much of her material online.

Here's a tool to list the files and return them in various formats: Tune lister.