[GOUNOD Charles]. PASTEUR Louis (1822-1895). L.A.S. "L. Pasteur", Paris 4 January 1886, to his "dear colleague" Charles GOUNOD; 1 page in-8. Letter of recommendation for his "little niece, Marguerite Heurteau, from Orléans (Loiret), a pupil of Dupré's" who "is destined for the theatre on the advice of her master. It seems that he has asked you to listen to her, and your kindness would have been obliging. My niece asks me to remind you of this and to grant her wish. I am very bold to write to you [...] it gives me the opportunity to greet a great master of contemporary art"... A P.A.S. from Dr Emile ROUX ("There is not a scientist who would not be proud to speak about art as Gounod spoke about Science", 1905) and a P.A.S. from Jules JANSSEN praising Gounod (1905) and a L.A.S. from Janssen to Mrs Gounod (on the back of a postcard, representing him in his office of Chamonix (1910) and explaining in which circumstances was taken this photograph.