The first section of each entry presents the following essential information: 

1. title of work and, if relevant, opus number, situated on the left of the page;
   
2. number(s) attributed to the work in Chomiński and Turło’s Katalog (Ch&T), located on the right oppo­site the title. In those rare cases where no such number has been assigned to a piece, we instead cite the page in Ch&T on which the relevant description can be found (see Mazurka in C major, Mazurka in D major).
   
3. place of publication and publisher of the first edition, along with the names of successors or other firms which acquired the edition.[1] Respective dates of commercial availability are also specified where known.[2] For works which had entered the public domain and were published by several firms in the same coun­try, the relevant details appear on separate lines to indicate that these were distinct editions and not later impressions of the original one. Italics are used to denote elements of a work’s editorial his­tory which are conjectural owing to lacunae in the source material (see the French editions of Opp. 1, 6, 7, 9, 11, 14, 15, 17, 20, 23, 26, 29, 31–34, 36, 38, 40, 41, 44, 49, 50, 53, 55, 61, 64, 69 & 71–73, Mazurka from La France Musicale, and Etudes from Méthode des Méthodes;[3] French and English editions of Hexameron; and Polish edition of the Polonaise in G- major). Such ‘reconstructions’ are under­taken only up to the publication of the latest impression to be catalogued, and never for subsequent output.[4]
   

[1] The classificatory criteria described in the previous section have been applied as relevant. Note that publishers’ names appear here in the abbreviated versions shown under Sigla of publishers.

[2] Often the exact date when a given impression or edition ceased to be marketed cannot be determined, hence the open-ended date references (‘from 18XX’) in respect of all English and Italian editions; most French editions; those of Hofmeister, Schuberth, Mechetti and Lienau (i.e. as successor to A. M. Schlesinger and to Tobias and Carl Haslinger); and most posthumous editions.

[3] The reconstructions proposed for the Brandus editions as well as the ones acquired from M. Schlesinger, Troupenas and Escudier frères and subsequently published by Brandus do not take into account the brief period from 25 July 1872 to 12 February 1873 when the firm traded as G. Brandus et Cie. During this time very few reprints were released (i.e. 11–1e-BRg, 15–1c-BRg, 28/13-24–1g-BRg, 32–1b-BRg, 46–1c-BRg, 61–1a-BRg), which explains the rarity with which the publisher’s name appears in this form on Chopin TPs.

[4] In the case of the Polonaise in G- major, for which no Polish sources have been located, a reconstruction of this kind is essential in order to determine the original publisher and date of publication.