 Brookfield's most successful work was the long-running Edwardian Musical Comedy, "The Belle of Mayfair" (1906), together with Basil Hood and Cosmo Hamilton, with music by Leslie Stuart, which also ran on Broadway beginning the same year.Another musical, the same year, was "See-See", with lyrics by Ross and music by Sidney Jones, at the Prince of Wales Theatre.His play "I Pagliacci" ran on Broadway in 1908.