Name That Tune

Tom Myron is at 33 of a series of 100 pieces in a contest to name various pieces from fragments of their scores. I know that I'm, pardon the expression, going to stay "tuned" to play (or watch other people play) the game. Today's was a real doozy: no key signature, G major (or G minor--or for that matter G flat major or G flat minor) chords being sustained by divisi strings, with a drop in the bass to octave Cs. Identifying the copyist's hand was probably the best clue.