These 24 Preludes by Manuel M. Ponce, composed in Paris in the 1920s, are taken from manuscripts in Mexico City. Twelve of them are versions of preludes which were published early this century, while twelve were not hitherto published. Together they make up 24, one in every major and minor key, which appears to have been Ponce's original intention. A preface in Spanish and English by Miguel Alcázar explains the origins of this set of pieces.