- Further, about having a bad cough, which is why she is not sure her voice will be on point for the performance, and about her intentions to attend a ball at Rose Marguerite Halphen‘s, the wife of the French mathematician Georges Henri Halphen (1844-89), the following Saturday, where she might dance until morning, promising to ice her throat and to do her best to please her co-singer the following day: "Je n'aurai pas tous mes moyens, je vous en préviens attendre que je tousse comme une malheureuse, et que j'aurai la faiblesse d'aller au bal costumé de Mme G Halphen Samedi et que dansant probablement jusqu'au matin ma voix ne sera pas claire le soir, j'avalerai des galces et je ferai mon possible pour plaire surtout à celui qui a la bonté de chanter avec moi [...]". - With the former collector's number "20" in pencil. Traces of former mounting on verso; traces of old folds; slightly foxed..