Contains correspondence between Sadie and various individuals concerning the performance and/or publication of the Mozart aria fragments and in particular includes correspondence between Sadie and Ian Page, conductor of the Classical Opera Company, featuring a discussion on matters of interpretation and arrangement. Also contains correspondence between Julie Anne Sadie and various individuals concerning the publication of the Mozart aria fragments following Sadie's death in 2005. A separate folder containing photocopies of music manuscripts and correspondence (dated 1972-1999) concerning Mozart manuscripts held by the Scottish Record Office is also included together with a CD-ROM which appears to hold images of the same material.