The Mendelssohn papers comprise the correspondence of Felix Mendelssohn Bartholdy and others; music by Mendelssohn, including autograph manuscripts, copyists' scores and vocal and instrumental parts; music by other composers owned by Mendelssohn, notably music by Bach, Handel and Beethoven; portraits and drawings of and by the composer; diaries and accounts; and family papers etc.
The shelfmarks of this collection are as follows: MSS. M. Deneke Mendelssohn a. 1-3, b. 1-14, c. 1-2, c. 4-100, d. 1-71, e. 1-19, f. 1-10, g. 1-11, MS. Autograph b. 10, MS. Don. c. 44, MS. Don. c. 151, MS. Mus. d. 210.