VERY interesting. It's quite strange how (apparently) totally unrelated events conspire to provide pertinent information. There is no way the @Cooper could know that I sing in a number of choirs, nor that one of those choirs has planned a performance of the Bach St John Passion for next year. Still less that I might actually [click] on the link - yet the very first image - a Viola d'amore - quite a rare instrument, is still in use today due primarily to the fact that Bach calls for such in his orchestration!!
) this one posting gives me knowledge that could give me unwarranted kudos 
