Q.R.S. Vocalstyle Home Minstrel Series Reproduced Piano Rolls

Found these rolls at an estate sale, I have been trying to find out more about them. They were reproduced I believe Early in the 1900's by Q.R.S. vocal style….. it was stated they were cleaning up the Music and Lyrics, so to preserve History !!!! Lyrics are printed along the right side of the rolls. Trying to figure out how many of these still survive.