Recent scholarship on Luis Misón (Mataró, 1727-Madrid, 1766) demonstrates the growing interest among the musicological community in studying the life and work of one who is an essential composer in the history of Spanish music. Musical historiography has extolled Misón's contribution to the genre of the tonadilla escénica, a genre widely appreciated in his time and which must have had a notable influence on his instrumental music, about which less is known. His talent as a flautist was appreciated within the noble circle of the House of Alba, where musical academies were held in which Misón actively participated and for which he composed 12 sonatas for transverse flute and bass dedicated to the Duke of Alba. These pieces were located in the archives of the House of Alba and described in 1927 by José Subirá (1882-1980), but unfortunately they disappeared during the Spanish Civil War (1936-39). The discovery of the five hitherto unknown Sonatas for Flute and Bass by Misón represents a substantial contribution to the Spanish chamber music repertoire of the second third of the 18th century for this instrument, given the scarcity of pieces written by Hispanic composers contemporary to Misón in which the flute is definitely the real protagonist. Moreover, they are sonatas which, from a technical point of view, pose interesting challenges to the flautist, something that highlights Misón's mastery of the flute, in accordance with surviving documentation of the period. Ortega explains that José Teixidor (c.1751-c.1811), vice-master of the Royal Chapel from 1778, considered his works to be no lesser than those of the best-known foreign composers and said of him that he was an unequalled performer on the transverse flute. The sonatas are found in five musical manuscripts preserved in the Lebrija Palace in Seville, a stately home dating from the 16th century, which in 1901 became