I was told by “coincidence” shortly before my father died end of March 2008 that my great-uncle Hans Thierfelder was a well-known, successful and important conductor. Within my family is transmitted, that among other things he conducted the Boston Symphony Orchestra and the Bayreuth Festival during the 3rd Empire (although he himself was honest non-political and Buddhist). The generations of my family who knew more about it are unfortunately all died. As far as I find time I try to research what can be proven and documented yet. This morning I found the following article with free mp3-Download in a blog of a Netherlands lover of old shellac discs (78 rpm):
Ludwig van Beethoven: Romance for violin und orchestra in F op.50
Josef Wolfsthal, Violin; orchestra of the Berlin State Opera under the direction of Hans Thierfelder
Polydor 69794 (B 27597/8) 869/70 az
Length: 9:04 Record from 1925