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In page Nan Merriman:

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Merriman sang many roles both live and on radio under the baton of Arturo Toscanini between 1944 and 1953, while he was conductor of the NBC Symphony Orchestra.[1] Among the roles she sang with him, were Maddalena in Act IV of Verdi's Rigoletto, Emilia in Verdi's Otello, Mistress Page in Verdi's Falstaff, and the trousers role of Orfeo in Act II of Gluck's Orfeo ed Euridice and also sang in his first and only studio recording of Beethoven's Ninth Symphony, with the NBC Symphony Orchestra, in 1952. She was also featured as Dorabella in a 1956 La Scala performance of Mozart's Così fan tutte, which was conducted by Toscanini's short-lived protégé, Guido Cantelli.[citation needed] She sang Mozart's Dorabella at San Francisco Opera in 1957.