I'm not sure where she died it was on the French Riviera Nice or Cannes I can't remember.
Nice. See : http://www.seminaire-sherbrooke.qc.ca/hist/hist5/travaux/biog/D/duncan.htm (in French)
Is the photo in public domain ?
photograph by Arnold Genthe doesn't seems to be public domain.
Was she born in San Francisco or Oakland?