Stephanie Jones plays Adagio from Violin Sonata No. 1 BWV 1001 by J.S. Bach (1685-1750). This comes via Siccas Guitars and their great YouTube Channel and played on a 2012 Michel Brück guitar. Jones also plays in a quartet with some other great young players all of whom have been feature on the site a few times. “Stephanie is currently in Germany studying a Masters in Classical Guitar Performance with Thomas Müller-Pering at the prestigious University of Music Franz Liszt.” Read more about Jones at her bio page. Sheet music for the violin works can be found online but I like the nice Urtext edition of the originals. Many people really just play the original violin music with a few added bass notes.