Autograph Letter Signed Sybil Sanderson, to Monsieur Livet at the Theatre au Cercle, saying that she has arrived and is now at his disposal, arrangements for the rehearsal, etc. In French. 2 pp. 6 x 4½ inches, with her monogram, integral leaf trimmed raggedly at head, but without loss of text, otherwise good. With a separate cabinet portrait photograph of Sanderson, by Reutlinger, Paris. Hotel de l’Europe [Paris], undated. Sibyl Sanderson (1864 – 1903) was a famous American operatic soprano during the Parisian Belle Époque. She was born in Sacramento, California, in the United States. After her father’s death in 1886, she and her mother moved to Paris and became transplanted socialites. Sanderson proved to be a remarkably gifted singer and began to appear on the stages of the Opéra-Comique, and later Opéra, in Paris, most notably in the works of Jules Massenet. She was his favourite soprano and appeared in the premieres of a number of his operas, the roles having been created for her unique talents (her professional debut took place in Paris in the title role in Esclarmonde).