Contains various scores for the viola, collected, annotated by or written by Karen Tuttle. Dated approximately 1720 to 1999. Original versions of compositions are included in the date range. Some is commercially produced music and others are handwritten music manuscripts.

Contains letters to and from students, including letters of recommendation Karen Tuttle wrote for students, and materials used for or about pedagogy, such as clippings, notes, and publications. Materials dated 1961 to 2007.