When Edwardes found success, beginning in 1907, in mounting English-language versions of the new generation of continental European operettas to the London stage, Ross wrote the English lyrics for the adaptations, often with libretti by Basil Hood. His words to the songs in "The Merry Widow" (1907) became the standard English version of that piece, performed throughout the world for many decades. Other Continental musicals that Ross anglicised included "A Waltz Dream" (1908), "The Dollar Princess" (1909), "The Girl in the Train" (1910), "The Count of Luxembourg" (1911), "The Girl on the Film" (1913) and "The Marriage Market" (1913), most of which had enduring success throughout the English-speaking world. Other successes from this period were the musicals "King of Cadonia" (1908), "Havana" (1908), "Our Miss Gibbs" (1909), "The Quaker Girl" (1911), and "Betty" in 1915. In addition, many of Ross's most successful pieces had additional successes on tour in Britain, in America and elsewhere. His biggest hits on Broadway included "The Girl from Kays" (1903), "The Merry Widow" (1907 and many revivals), "Havana" (1909), "Madame Sherry" (1911) and "The Quaker Girl" (1911).