The Race to Urga

The Race to Urga is a musical theatre play, started in 1968 as an adaptation of the Bertolt Brecht play "The Exception and the Rule", with the project soon renamed to "A Pray by Blecht". The theme of Brecht's play was the exploitation of capitalism of the working class in the 1930s.
Jerome Robbins asked John Guare to write the adaptation. Leonard Bernstein was to compose the music, with Stephen Sondheim intending to write the lyrics. The musical was announced for a production at Lincoln Center for January 1969, but during cast auditions Robbins left the production and it was not produced. 
The show was never completed, but in April–May 1987 a workshop production was presented at the Mitzi Newhouse Theater at Lincoln Center. Direction and choreography were by Jerome Robbins.
There is no known recording of this show, although there was a demonstration recording done in 1968.