Elizabeth Aaron taught ear-training in the Techniques of Music department of Mannes College of Music (later, Mannes School of Music at The New School) from 1957 to 2017. The collection consists of administrative files relating to Aaron’s committee roles, Mannes board of trustee minutes, notebooks, recordings, photographs, and materials pertaining to the attempted merger of Mannes and Manhattan School of Music in 1978.

Risë Stevens (1913-2013) was an operatic mezzo-soprano, actress, and a music administrator who served as president of the Mannes College of Music from 1975 to 1978. The collection contains performance scores of Broadway and jazz standards of the 1930s and 1940s arranged for her, likely for use in her commercially recorded albums of such standards.