ERTÉ (ROMAIN DE TIRTOFF) (1892-1990) 26 studies for Act I of 'Der Rosenkavalier' i) The Marschallin's negligee signed 'Erté' (lower right) gouache on card 37.4 x 27cm (14 3/4 x 10 5/8in). ii) The Marschallin's boudoir in Act I signed 'Erté' (upper right) gouache on card 27 x 37.4cm (10 5/8 x 14 3/4in). iii) Octavian signed 'Erté' (lower right) gouache and silver pen on card 37.2 x 27cm (14 5/8 x 10 5/8in). iv) Octavian second costume signed 'Erté' (lower right) gouache on black card 37.2 x 27.2cm (14 5/8 x 10 11/16in). v) The majordomo of the Marschallin signed 'Erté' (lower right) gouache and silver pen on card 37.4 x 27.4cm (14 3/4 x 10 13/16in). vi) The footmen of the Marshallin signed 'Erté' (lower right) gouache and silver pen on card 37.4 x 27.3cm (14 3/4 x 10 3/4in). vii) The Marschallin's personal maid signed 'Erté' (lower right) gouache and silver pen on card 37.3 x 27.1cm (14 11/16 x 10 11/16in). viii) The Marschallin alone at her desk and the clock signed 'Erté' (upper right) gouache on card 27.2 x 37.3cm (10 11/16 x 14 11/16in). ix) The notary signed 'Erté' (lower right) gouache and gilt on card 37.5 x 25.5cm (14 3/4 x 10 1/16in). x) The writer - second version signed 'Erté' (lower right) gouache on card 37.4 x 27.4cm (14 3/4 x 10 13/16in). xi) The flute player signed 'Erté' (lower right) gouache on card 37.5 x 27.3cm (14 3/4 x 10 3/4in). xii) The Italian singer signed 'Erté' (lower right) gouache and gilt on card 37.4 x 27.3cm (14 3/4 x 10 3/4in). xiii) A widow of noble family signed 'Erté' (lower right) gouache on card 37.4 x 27.4cm (14 3/4 x 10 13/16in). xiv) The three orphans signed 'Erté' (lower right) gouache and gilt on card 37.3 x 27.1cm (14 11/16 x 10 11/16in). xv) The hat seller signed 'Erté' (lower right) gouache on card 37.5 x 27.3cm (14 3/4 x 10 3/4in). xvi) The hunter signed 'Erté' (lower right) gouache and silver pen on card 37.5 x 27.3cm (14 3/4 x 10 3/4in). xvii) Valzacchi with his black newspaper signed 'Erté' (lower right) gouache on card 37.5 x 27.5cm (14 3/4 x 10 13/16in). xviii) The hairdresser signed 'Erté' (lower right) gouache and silver pen on card 37.3 x 27.3cm (14 11/16 x 10 3/4in). xix) The hairdresser's assistant signed 'Erté' (lower right) gouache on card 37.4 x 27.3cm (14 3/4 x 10 3/4in). xx) The cook and his assistant signed 'Erté' (lower right) gouache and silver pen on card 37.5 x 27.5cm (14 3/4 x 10 13/16in). xxi) A courier signed 'Erté' (lower right) gouache and silver pen on card 37.5 x 27.5cm (14 3/4 x 10 13/16in). xxii) Annina signed 'Erté' (lower right) gouache and gilt on card 37.2 x 27.2cm (14 5/8 x 10 11/16in). xxiii) Leopold, the Baron's body servant and natural son signed 'Erté' (lower right) gouache and gilt on card 37.5 x 27.5cm (14 3/4 x 10 13/16in). xxiv) The Baron's chaplain signed 'Erté' (lower right) gouache on card 37.4 x 27.3cm (14 3/4 x 10 3/4in). xxv) The Marschallin crowned signed 'Erté' (lower right) gouache on card 37 x 27cm (14 9/16 x 10 5/8in). xxvi) Octavian signed 'Erté' (lower right) gouache and silver pen on card 37 x 26.5cm (14 9/16 x 10 7/16in).