Free public domain sheet music from IMSLP / Petrucci Music Library
Paris: Naderman, n.d. Plate 1539.
Public Domain [tag/del]
Presumably from the Moulis-Gauckler-Herrenschmidt Archives, these 2 parts tied with a piece of thread, like most of the other scores from the same archive, presumably to prevent "score splitting" a commendable scheme that did not however prevent the harp part from disappearing.
||3 Harp Sonatas
||3 Sonatas for Harp with Flute or Violin Accompaniment