There is reportedly no mention of Seltsam Mutter geht es mir, one of the two new songs, in any of the Mendelssohn literature. The song, which is written in C major and has an "experimental quality," is typical of Mendelssohn's youthful style, according to Gramophone.
Der Wasserfall, the second song, exists in incomplete form in a source in Berlin, but is reportedly unperformable as such. The new manuscript completes the song, providing a third stanza which Gramophone says is "both beautiful and harmonically adventurous."
The manuscript is inscribed and dated 1825, probably by its recipient, Agnes Rauch.