Dobranoc The title is Gute Nacht in German thus Op. 137. No. 2, Gute Nacht, du mein herziges Kind, f. A. (od. Br.) Offenbach, André is possible. However, there is another song translated "Cich spy",(Schlaf leise) so the scores must be compared.
The opening melody is the same (in C major here, B♭ major in the RISM copy (Fragliches Autograph, RISM id 451504504) of Gute Nacht op.137/2, but key is often transposed for voice type and convenience with vocal works, I do believe, etc. ...) - Schissel
