Two nocturnes for piano, op. 48 : autograph manuscript, 1841?

Each Nocturne has its own divisional t.p.: on op. 48, no. 1: "[illegible deletion] 13 [sic] Nocturne."; on op. 48, no. 2: "[illegible deletion] 14me Nocturne".
This manuscript was not known to Brown or Kobylańska; it is listed in Józef Michał / Chomiński and Teresa Dalila Turło, Katalog dzieł Fryderyka Chopina = A Catalogue of the Works of Frederick Chopin (Kraków: Polskie Wydawnictwo Muzyczne, 1990), p. 145.