Gertrude Lawrence but when he proved to be unenthused by the suggestion, Lawrence sent the book to Richard Rodgers and Oscar Hammerstein II. Rodgers initially demurred because he felt Lawrence's vocal range was limited and she had a tendency to sing flat. But he realised the story had strong potential, and the two men agreed to write what ultimately became "The King and I". It opened on Broadway in March 1951, and ultimately, Lawrence won the Tony Award for Best Actress in a Musical for her performance. Her triumph was short-lived; her health deteriorated rapidly, forcing her to miss numerous performances until
Oscar Hammerstein II but his alcoholism had become out of control, and he was unable to write. Hart was also not certain that the idea had much merit, and the two therefore separated. The adaptation became the first Rodgers and Hammerstein collaboration, entitled "Oklahoma!", which opened on Broadway in 1943. It furthered the revolution begun by "Show Boat", by thoroughly integrating all the aspects of musical theatre, with the songs and dances arising out of and further developing the plot and characters. William A. Everett and Paul R. Laird wrote that this was a "show, that, like 'Show Boat', became a milestone, so