Following a suggestion by David in New Zealand, I re-visited Leonid Kogan's 1954 public performance of Bach's Chaconne. It is indeed an amazing performance, and an incredible example of fine violin playing. Kogan often ventured into unaccompanied Bach (unlike David Oistrakh who, probably wisely, appears to have pretty well avoided it). The worst unaccompanied Bach I ever listened to was by Alfredo Campoli; at a concert I attended long ago in Blenheim Palace around 1969 when he stood-in for an indisposed Menuhin, and also from some private recordings from the Campoli family archives. Big, fat, throbbing Bach: sounded like Max Bruch's twin brother.