https://syncopatedtimes.com/fred-hager-and-the-birth-of-country-music/?fbclid=IwAR0MxtZjyRCAoleqof-W7AUnmx_bUmYGn3ZKy9xsUDSXLZvksBY9Lrv6BFI
Now I'm going through Ernest Stoneman records on YouTube listening for telltale ukulele plinking in the background. Easy to loose it in the similar-octave strumming of the autoharp and mandolin, such as that heard on Stoneman's famous Titanic recording...
https://youtu.be/skSUX7pNmSU
Hop Light Ladies may have been one where Iver put down the uke and played the harmonica...
https://youtu.be/boE8U3wAUC4
New River Train might have a ukulele in there, mostly smothered by the banjo...
https://youtu.be/nQzRrLuWOE0
I'll keep listening.