This article aims to present the profile of a forgotten French composer of the Romantic era. René de Boisdeffre (1838-1906) was an outstanding melodist like Mozart or Schubert. It is situated close to Gabriel Fauré, Charles Gounod, and Jules Massenet. On the other hand, the fascination with Bach's polyphony indicates the influence of Camille Saint-Saëns. His work consists of miniatures with a program intended for various chamber casts. His music is full of elegance, restraint, subtlety, warmth, rich tonal colors, lightness, and charm. He is alien to sharp consonances, monumentalism, great drama, and pathos. There are also more complex forms, with a tough texture and structure, rooted in Beethoven's work. Therefore, it can conclude that the somewhat introverted nature of the artist. It is difficult to unequivocally why such beautiful and valuable chamber literature is forgotten. Fortunately, there was a passionate patron of the arts in Poland - the artistic director, producer, and publisher of Acte Préalable - Mr. Jan A. Jarnicki, who gathered a group of enthusiastic artists ready to take part in recording the phonographic mono-graph of an unknown French artist. Therefore, the article expands to include a catalog of albums released. The publishing house can play an essential role in shaping conscious recipients of art and, above all, in finding, preserving, and preserving forgotten or lost treasures of world music culture for posterity.