 Pushed by business conflicts, Nielsen abandoned her Company and left to study grand opera, coached in the Italian repertoire by Enrico Bevignani, who had coached Swedish operatic soprano, Christine Nilsson.In the Spring of 1905, Nielsen returned to London's Covent Garden to perform in several Mozart operas.She joined the roster of the San Carlo Opera Company (SCOC), at that time a touring arm of the Teatro di San Carlo of Naples led by Henry Russell, the following fall for their guest Fall season in residence at Covent Garden with Enrico Caruso and Antonio Scotti.