MUSIC. 7 letters or pieces. Esprit AUBER (9 January [1847]: he intends to write an opera and to "set to work as soon as I am in possession of the poem my friend Scribe is to write"; portrait attached). Jean-François BERTHELIER (l.a.s., 27 August 1873, on the rehearsals of La Vie parisienne). Louis BOURGAULT-DUCOUDRAY (l.a.s., Vernouillet 28 October, on oriental music and diatonic modes). Italo CAMPANINI (p.a.s., on the back of a programme, 1891). Fiorello GIRAUD (p.a.s., 1912). Nino MARTINI (signed programme, 1938). Herminie OFFENBACH (p.s. for her husband, co-signed by Ch. Comte, copyright statement for La Diva).