Chopin himself published forty-one mazurkas of his composition in eleven sets of four, five, or three numbers—Op. 6, Quatre Mazurkas, and Op. 7, Cinq Mazurkas, in December, 1832; Op. 17, Quatre Mazurkas, in May, 1834; Op. 24, Quatre Mazurkas, in November, 1835; Op. 30, Quatre Maazurkas, in December, 1837; Op. 33, Quatre Mazurkas, in October, 1838; Op. 41, Quatre Mazurkas, in December, 1840; Op. 50, Trois Mazurkas, in November, 1841; Op, 56, Trois Mazurkas, in August, 1844; Op. 59, Trois Mazurkas, in April, 1846; and Op. 63, Trois Mazurkas, in September, 1847. In tne posthumous works published by Fontana there are two more sets, each of four numbers, and respectively marked as Op. 67 and 68. Lastly, several other mazurkas composed by or attributed to Chopin have been published without any opus number. Two mazurkas, both in A minor, although very feeble compositions, are included in the editions by Klindworth and Mikuli. The Breitkopf and Hartel edition, which includes only one of these two mazurkas, comprises further a mazurka in G major and one in B flat major of 1825, one in D major of 1829-30, a remodelling of the same of 1832—these have already been discussed—and a somewhat more interesting one in C major of 1833. Of one of the two mazurkas in A minor, a poor thing and for the most part little Chopinesque, only the dedication (a son ami Rmile Gaillard) is known, but not the date of composition. The other (the one not included in Breitkopf and Hartel’s, No. 50 of Mikuli’s and Klindworth’s edition) appeared first as No. 2 of Noire Temps, a publication by Schott’s Sohne. On inquiry I learned that Notre Temps was the general title of a series of 12 pieces by Czerny, Chopin, Kalliwoda, Rosenhain, Thalberg, Kalkbrenner, Mendelssohn, Bertini, Wolff, Kontski, Osborne, and Herz, which appeared in 1842 or 1843 as a Christmas Album. [FOONOTE: I find, however, that Chopin’s Mazurka was already separately announced as “Notre Temps, No. 2,” in the Monatsberichte of February, 1842.] Whether a Mazurka elegante by Fr, Chopin, advertised in La France Musicale of April 6, 1845, as en vente au Bureau de musique, 29, Place de la Bourse, is identical with one of the above-enumerated mazurkas I have not been able to discover. In the Klindworth edition [footnote: That is to say, in the original Russian, not in the English (Augener and Co.’s) edition; and there only by the desire of the publishers and against the better judgment of the editor.] is also to be found a very un-Chopinesque Mazurka in F sharp major, previously published by J. P. Gotthard, in Vienna, the authorship of which Mr. E. Pauer has shown to belong to Charles Mayer.