While fantaisieimpromptu.net uses a variety of sources to justify the information presented to you, there are a few “Core Sources”. Core Sources are sources that form the foundation of study and serve as a pillar to most information found on this website. One of these Core Sources is Rekopisy Utworów Chopina.
Rekopisy Utworów Chopina is a book divided into two volumes authored by Krystyna Kobylanska, a well known and respected Chopinologist.
This book is split into two volumes. This book is in Polish and in English.

– Book Details –
Book Title: Rękopisy Utworów Chopina // Katalog // Manuscripts of Chopin’s Works // Catalogue
Author: Krystyna Kobylańska
Language: Polish & English
Volumes: 2
– Notes –
PWM Edition, 1977, Towarzystwo Im. Fryderyka Chopina // Polskie Wydawnictwo Muzyczne
Each work is catalogued with a number. The manuscripts of Fantaisie-Impromptu are labeled 932, 933, 934, 935, 936, 937, 938, and 993, respectively.
- 932 / Autograph (1835 Version, d’Este Version) // Paris Vendredi 1835
- 933 / Autograf lub Kopia (Lost “Alleged” Copy) « This is an interesting entry. This a manuscript that could be either by Fontana or Franchomme. This manuscript is only referenced to an a letter from Fontana to Ludwika.
- 934 / Kopia Auguste’a Franchomme’a (A). Impromptu de Chopin
- 935 / Kopia Auguste’a Franchomme’a (B). Impromptu inedit / pour le piano / Par Frédéric Chopin / Janv. 49.
- 936 / Kopia hr. Fernanda de Cosby [Ferdinand de Costa]
- 937 / Kopia Marie Roubaud de Cournand)
- 938 / Snippet from Franchommme (A.)
- 939 / Snippet from Franchomme (B).