The Deuxieme livre de pieces pour la Flute Traversiere, avec la Basse Continue taken from the suite in G-major has the name 'Sonate l'inconnue'. It contains really no actual dance-movements, and the-at that time in France untypical-name 'Sonata' hints clearly to the virtuoso, typically recorder-wise passages mainly in the Chaconne.
Order of movements:
Sonate l'inconnue - Vivement - Chaconne
Scores and parts
Edition baroque eba1153