The unpublished Assai Tranquillo was composed on a journey from Düsseldorf to Leipzig on 25 July 1835. Mendelssohn wrote it as a memento for his friend and colleague Julius Rietz, a cellist who had also been Mendelssohns assistant Kapellmeister in Düsseldorf. The little piece was probably unfinished, as it ends with a pause on the dominant, but Mendelssohn signed it at that point and added a friendly dedication. In 1962 the piece was reproduced in facsimile by Reinhold Sietz in his article Das Stammbuch von Julius Rietz
, now part of the collection Studies in the Music History of the Rhineland
(published by Arno Volk, Cologne).
from notes by Susan Tomes © 1991