1813-1883 1844-1900 1875-1955 1901-1981 20thcentury authors bayreuth beidler biography bülowfamily composers composers'spouses correspondence correspondencebeidler correspondencemann cosima diaries friedrichwilhelm german germany jones nietzsche operaproducersanddirectors richard thomas unitedstates wagner wagnerfamily wives womeninthelabormovement womenlaborleaders womenlaborunionmembers workingclasswomen