Comments; In this manuscript, in addition to the piano which is written on three staves, there is another stave where the rhythm is noted (played mainly by the percussion instruments) and another where the melody of the voice or voices is noted. In the melodic line of the voice, the metric of the speech is noted, sometimes with arrows indicating the strong parts of the meter, sometimes with the rhythmic value of each syllable written and sometimes with the melodic - rhythmic movement of the voice written.
In the piano part, some glissandi are noted which of course are not played but refer to the orchestral score.