The Photographs Series contains autographed photographs of Alban Berg, Fritz Heinrich Klein, and Bernhard Sekles, as well as photographs of Julius Schloss. Additional photographs printed in other series of the collection are listed below as well.

This series consists of copies of the correspondence with agencies and others concerning Sonde musical pieces, performances and recordings.

This series consists of poems and articles written by members of Sonde.

This series consists of audio recordings of Charles de Mestral works.

This series consists of video recordings of Charles de Mestral works.

The Reviews/Clippings Series contains Charles Reiner’s clippings or reviews, and other articles from newspapers, magazines, and other published listings. The reviews and clippings are arranged by time period as indicated.

This series consists chiefly of artifacts used or created by the Sons of Scotland Benevolent Association at the Scottish Centre in Verdun. The artifacts include commemorative plaques, badges, and sash pins worn by members and officers during meetings and functions, a gavel, a trophy, and framed photograph of Queen Elizabeth II. Some of the artifacts are related to administrative activities, including two embossing machines and blank letterhead and stationery.There is also some textual ephemera representing social activities of the Scottish Centre, such as a list of Christmas carols.

The series contains Leon Edel's correspondence, with the majority before 1989. The correspondence ranges from personal to professional and literary, with letters from friends, acquaintances, scholars, authors, and publishers, such as Harvard University Press. Files that are significant either because of the correspondent or due to the extent of the correspondence include W. W. Norton, Anais Nin, Hannah Arendt, E. M. Forster, H. Montgomery Hyde, Geoffrey Keynes, and Allen Ginsberg. Many of the letters represent Edel's ongoing work to acquire copies of Henry James's correspondence and seek out information about the author from his contemporaries. Also includes a number of letters related to various lectures given during the 1960s and 1970s.