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.

Miscellaneous memorabilia relating to Theodore Harrison, Chicago concert baritone, choral conductor and teacher, consisting of clippings, programs and publicity material. Also, material concerning the Hull-House Music School and Chorus, including two recordings, as well as items about singers Nancy Carr and Barre Hill.