English and German words.
Library's copy is a proof lacking all preliminary matter, with some annotations in Mendelssohn's hand.
In the Library's proof, the English text is printed, the German text has been added by hand in red ink above or below it, and the music adjusted to accomodate the German words.
Blank pages between p. 73-74, 99 and 99 (repeated), 143-144 (two blank pages), 190-191, 205-206; numerous examples of double pagination, large/small letter sizes, and inversion.