This Andante and Allegro op. 60 nos. 14 and 15 come from Sor’s Introduction to the study of the guitar op. 60 which he published in Paris in about 1836 or 1837. It was his last work for solo guitar.
The complete set of Sor’s Introduction to the study of the guitar op. 60 is available from Tecla Editions at www.tecla.com as part of the new 2019 second edition of Sor’s New Complete Works for Guitar edited by Brian Jeffery. For details about Sor’s music and his biography, please see www.tecla.com.