Found Dorothy Minty Violinist Acetate on Bell Records: anyone know this?

[Earth river]

Hey all,

I recently purchased a large collection of classical vinyl LPs.  While going through the lot I have come across a few acetate test pressings.  One that I am excited about is on Bell Records titled: 
SIDE 1:  SONATA for CEMBALE and VIOLINO in F MINOR.  Harry Cumpson - Harpsichord, Dorothy Minty - Violin Large-Allegra.
SIDE 2:  All the same except for:  Adagio-Vivace

I am intrigued by this and only know a little about Dorothy Minty.  She was a teacher at Juliard, friend of Ansel Adams. 

Do any of you know anything else about this recording? 

Thanks,

Morgan