One significant document in the Freemantle Collection is a manuscript of Mendelssohn’s ‘Allegro Brillante’ in A major, Op. 92. It is a copy of Mendelssohn’s early compositional sketches for this work, which Freemantle transcribed from the original autograph, presumably to allow comparison to the final completed composition.
The document contains passages from the ‘Allegro assai vivace’ section in 6/8, which most printed publications begin with. However, it also contains fairly complete sketches of an ‘Andante’ section, which comes before the ‘Allegro assai vivace’. The Andante was omitted from the first publication by Breitkopf & Härtel in 1851 and in all subsequent copies, but was restored in the 1994 edition by E. G Heinemann, published by G. Henel Verlag. The 'Allegro assai Vivace' section is different to the published composition - one example being in the Primo part, where the opening of the Vivace contains harmonic differences between the sketch and final composition, but retains rhythmic similarities.
The MS is dated 26 March, 1841, in Leipzig. This work was written as a gift to Clara Schumann to show support for her whilst she was engaged in legal battles with her father. It was first performed on Wednesday 31 March 1841, at the Gewandhaus concert hall in Leipzig. It was also the first concert that Clara Schumann gave under her new name, having previously performed as Clara Wieck.