Jules Demersseman was a composer of remarkable skill and talent--as well as the leading flute virtuoso in Paris during his short life (1833-1866.) He composed a substantial number of works, not only showpieces for the flute, but also brilliant works for oboe, clarinet, bassoon, and new instruments created by Adolphe Sax--such as the saxophone, the sax trombone, the sax horn, and the sax trumpet with 6 piston valves.
Among his 130 opus numbers are four great collection of operatic fantasies: Opus 12, Opus 50, Opus 55, and Opus 60. Each collection contains six operatic fantasies for flute and piano. Here below are the contents of each collection.
Op.12 – 6 Fantaisies for Flute and Piano (contents)
Fantaisie sur La Vestale de Spontini for Flute and Piano
Fantaisie sur Sardanapale de ??? for Flute and Piano
Fantaisie sur La Straniera de Bellini for Flute and Piano
Fantaisie sur Cosi fan tutte de Mozart for Flute and Piano
Fantaisie sur La Cenerentola de Rossini for Flute and Piano
Fantaisie sur Melodies de Schubert for Flute and Piano
Op.50 – 6 Fantaisies for Flute and Piano (contents)
Fantaisie sur Richard Coeur de Lion de Gretry for Flute and Piano
Fantaisie sur La Sonnambula de Bellini for Flute and Piano
Fantaisie sur Don Giovanni de Mozart for Flute and Piano
Fantaisie sur Norma de Bellini for Flute and Piano
Fantaisie sur L'Elisire d'Amore de Donizetti for Flute and Piano
Fantaisie sur Il Barbiere di Siviglia de Rossini for Flute and Piano
Op.55 – 6 Fantaisies progressives for Flute and Piano (ca.1866) contents
Fantaisie sur Zauberflöte de Mozart for Flute and Piano
Fantaisie sur Anna Bolena de Donizetti for Flute and Piano
Fantaisie sur Il Crociato de Meyerbeer for Flute and Piano
Fantaisie sur I Puritani de Bellini for Flute and Piano
Fantaisie sur Le Saphir de Felicien David for Flute and Piano
Fantaisie sur Semiramis de Rossini for Flute and Piano
Op.60 – 6 Fantaisies for Flute and Piano (contents)
Fantaisie sur Freischütz de Weber for Flute and Piano
Fantaisie sur Il Bravo de Mercadante for Flute and Piano
Fantaisie sur Les Charmeurs de Poise for Flute and Piano
Fantaisie sur Beatrice di Tenda de Bellini for Flute and Piano
Fantaisie sur Betly de Donizetti for Flute and Piano
Fantaisie sur Le nozze di Figaro de Mozart for Flute and Piano
IMSLP does not have any of these four collections, or even any of these above-mentioned Fantasies. I have searched several other archives, and the only one I was able to locate was the Fantaisie sur Il Crociato de Meyerbeer for Flute and Piano.
IMSLP does have six of Demersseman's operatic fantasies for flute and piano that were published separately. But there are several other of Demersseman's operatic fantasies that were also published separately (i.e., not in any of the four afore-mentioned collections) that IMSLP does not have, for example:
Fantaisie sur Lara de Maillart
Fantaisie sur Lalla Roukh de Felicien David
Grand Air Varie No. 2 sur Armide de Gluck.
The addition of these operatic fantasies to IMSLP's archive would be most valuable.