Sor’s Les Adieux in French or La Despedida in Spanish, op. 21, exists not only in a Paris edition of about 1825 but also in a Spanish edition of similar date. It may have been composed in London in 1816 on the occasion of the departure from London of Sor’s colleague the violinist Francesco Vaccari.
This edition comes from the new 2020 second edition of Sor’s New Complete Works for Guitar edited by Brian Jeffery. The Introduction and Index to the entire series can be seen here on this site.