Karl Miller:

>>For a research project...I am trying find or compile a list of well known
>>individuals who were amateur musicians active playing chamber music.

H.L.  Mencken and the Saturday Night Club.  See "H.L.  Mencken on Music,"
edited by Louis Cheslock (long out of print, but still available used
and in libraries here and there).

Regards,
Bob Chen
Los Angeles, CA