To the names of Chopin's friends and acquaintances to whom I am indebted for valuable assistance, those of Madame Peruzzi and Madame Schumann have, therefore, to be added.

My apologies as well as my thanks are due to Mr.Felix Moscheles, who kindly permitted a fac-simile to be made from a manuscript, in his possession, a kindness that ought to have been acknowledged in the first edition.

I am glad that a second edition affords me an opportunity to repair this much regretted omission.

The manuscript in question is an "Etude" which Chopin wrote for the "Methode des Methodes de Piano," by F.J.Fetis and I.Moscheles, the father of Mr.Felix Moscheles.

This concludes what I have to say about the second edition, but I cannot lay down the pen without expressing my gratitude to critics and public for the exceedingly favourable reception they have given to my book.
October, 1890..