Sofía Cancino de Cuevas first quartet for strings, catalogued as Op. 1. In 1940, she received an honorable mention for her symphonic poem "El gallo en Pátzcuaro" for orchestra and male choir, in a contest organized by UNAM. In 1941 she directed the presentation of Mozart's "Don Giovanni" at the Arbeu theater, with the participation of singers (baritone), Carlos Mejía (tenor), and Margarita Cueto (soprano), among others. This made her Mexico's first female conductor. In 1944 she founded the Opera School, with which she conducted "La serva padrona" by Giovanni Battista Pergolesi, "Bastien und Bastienne" by Wolfgang Amadeus Mozart, and "Il matrimonio segreto" by
The Giant (opera) music he devised for this was transcribed. The plot was elaborated from the children's games he played with his friends Egorka and Stenya, whose names are preserved in those of the characters. In the following year, the first act of the opera was given a premiere by the family at the estate of one of Prokofiev's uncles near Kaluga, with his aunt Tatiyana taking the title part, and the composer and his cousins taking the other leading roles. There is no record of further performances. The opera is apparently nearly entirely lost, although Nestyev quotes some musical extracts. A terrible