Clippings, correspondence, flyers, photographs, and programs of George Estevez, founder and director of the Choral Ensemble of Chicago. Originally called the Chicago Chamber Choir and founded at the Jane Addams Hull House Center, the choir later moved to St. Paul's United Church of Christ and remains a volunteer organization using professional musicians as needed. Material on Ruth Page, Mary Gehr, Rudolph Ganz, Claudia Cassidy, Richard Christiansen, and many others is present.

Original work, reproductions of work, correspondence and subject files of Chicago artist Mary Gehr.