The family papers inherited by Marie's and Lili's children form the basis of the extensive collection of Mendelssohn manuscripts, including the so-called "Green Books" of his correspondence, now in the Bodleian Library at Oxford University.
Blandt familiedokumenterne, som Maries og Lilis børn arvede, er der mange af Mendelssohns manuskripter, herunder de såkaldte ”Grønne Bøger” med hans korrespondance, der nu findes på Bodleian Library i Oxford.