This collection contains materials pertaining to Ihor Sonevyts’kyi, including official personal documents such as IDs and passports, along with military, educational, financial, and immigration records. Additionally, there are Sonevyts’kyi’s writings, notebooks and drafts. Family materials include genealogical research and several drawings of the Sonevyts’kyi family tree, as well as books and writings by Mykhailo Sonevyts’kyi. A large portion of the collection is composed of books, many with inscriptions, along with newspaper and magazine clippings. Finally, there are photographs and both personal and professional correspondence, a great deal of which are concert invitations and programs.