File includes a postcard with a black and white photograph of Pietro Mascagni (1863-1945), an Italian opera composer. The postcard has various signatures on the front, including Francesco Marconi (1855-1916, operatic tenor from Rome) and four other illegible signatures. The postcard is addressed to Frau Dr. Lehnsern(?) of Berlin. File also includes the incipits of three pieces by Ignaz Moscheles (1794-1870), signed at dated October 3, 1844. There are also five letters written by the following composers: Jacques Offenbach (1879), Gustav Mahler (1899), Edvard Grieg (1902), Maurice Ravel (1921), and Ignacy Paderewski (n.d., 1860-1941).
File contains a letter written by Franz Liszt to an unidentified person, accompanied by a typed transcription. The letter addresses the publication of some of his songs by Schott, and his cousin, Mlle. Liszt.
File contains a newspaper article on Ballon's performance at the Prom concert series in London, England, and two pages of photocopied news articles on the same performance.
File contains a first edition publication of Mozart's Piano Concerto No. 23, including the solo piano part and parts for each orchestral instrument (violins, horn, viola, cello, double bass, bassoon, flute, clarinet). The edition was published by J. André of Offenbach.
File contains a copy of the 1906 publication of Anna Magdalena's 1725 Notebook with various short piano compositions, edited by Dr. Richard Batka. The book is inscribed to Ellen Ballon by Clara Lichtenstein, her teacher at McGill Conservatorium of Music, and dated April 7, 1910 in Montreal.
File contains a first edition copy of Chopin's Mazurkas, Op. 63, published by Breitkopf and Hartel. The compositions were dedicated to the Countess Laura Czosnowska.
File contains each of the three Op. 71 polonaises by Frédéric Chopin, published posthumously under the guidance of Julian Fontana. Each Polonaise includes a note from Fontana regarding their publication (dated May 1855, in Paris).
File contains two songs arranged by Kathleen Heron-Maxwell, "Dear Old London" (1926) and "Keep on Hopin'" (1915). Both scores are inscribed by the arranger.