The Diva's Ruby by F. Marion Crawford

A few days after she had talked with Lady Maud, and before Mr. Van Torp's arrival, Margaret had gone abroad, without waiting for the promised advice in the matter of the wedding-gown. With admirable regard for the proprieties she had quite declined to let Logotheti cross the Channel with her, but had promised to see him at Versailles, where she was going to stop a few days with her mother's old American friend, the excellent Mrs. Rushmore, with whom she meant to go to Bayreuth to hear _Parsifal_ for the first time.

Mrs. Rushmore had disapproved profoundly of Margaret's career, from the first. After Mrs. Donne's death, she had taken the forlorn girl under her protection, and had encouraged her to go on with what she vaguely called her 'music lessons. ' The good lady was one of those dear, old-fashioned, kind, delicate-minded and golden-hearted American women we may never see again, now that 'progress' has got civilisation by the throat and is squeezing the life out of it. She called Margaret her 'chickabiddy' and spread a motherly wing over her, without the least idea that she was rearing a valuable lyric nightingale that would not long be content to trill and quaver unheard.