Now back together, and back in the Middle School orchestra room:
I glued the pieces, those that made sense to look after, back together. Bushed the C and A pegholes, installed internal crossgrain cleats in the pegbox across the C and A peghole locations. Added a chunk of curly maple on the treble side, where it was missing and badly splintered. I didn't spend too much time with color-matching, it was a functional school repair that I probably underbid -- but, as in my previous post, the back and ribs were nicely done. Worth saving, I thought.
This viola should serve for several more years, barring too rough of use. Or dropping. Can't warranty against dropping.