Debussy wrote a Sonata for Flute Viola and Harp — a piece full of French spirit:
Its ambiguity of harmony and form, fragmented, halting phrases, and almost pointillistic use of color bear striking resemblance to earlier orchestral works such as La mer and Prélude à l’après-midi d’un faune. Its opening harp arpeggio is joined by flute acrobatics; viola sneaks in in unison with the flute and introduces a disjointed, dreamy, watery theme.
LA Phil https://www.laphil.com/musicdb/pieces/3401/sonata-for-flute-viola-and-harp
It’s very ’early Debussy'
Debussy himself recognized the shadows of the younger composer in this work, and seemed to mourn his loss in a letter to Godet dated December 11, 1916: “The sound of it is not bad, though it is not for me to speak to you of the music. I could do so, however, without embarrassment for it is the music of a Debussy whom I no longer know. It is frightfully mournful and I don’t know whether one should laugh or cry - perhaps both?”
LA Phil https://www.laphil.com/musicdb/pieces/3401/sonata-for-flute-viola-and-harp