Fonds contains correspondence, musical scores (piano and orchestral), photographs, a sketch, harmony notebooks, fliers, programs, newspaper clippings, academic journals, a press book, scrapbooks, and letters of composers. The musical scores include several first edition copies and autograph manuscripts. All personal correspondence is incoming correspondence; no outgoing correspondence is included in this fonds.
File includes a program for Ellen Ballon's concert with the Montreal Symphony Orchestra, conducted by Ernest Ansermet. The file also includes a catalogue Londoof London Records, including Ballon's recording of Heitor Villa-Lobos' Piano Concerto No. 1 with Ansermet.
File contains a program for a centennial concert celebration at McGill University, featuring the McGill Symphony Orchestra and John McKay on piano. Ellen Ballon is cited in the introduction as one of McGill's notable graduates.