The Hermene Warlick Eichhorn Papers date from 1920 to 1975 and include general correspondence regarding Eichhorn's musical interests and professional activities, including the Euterpe Club and her column "Music Notes." The correspondence is arranged alphabetically by correspondent.

There is also a great deal of correspondence regarding her individual compositions; this correspondence is arranged alphabetically by title of the piece, then chronologically within each file.

Carbon copies of Eichhorn's letters on extremely brittle paper were included with the collection, forming a complete set of correspondence; these letters were photocopied in order to better preserve the collection as a whole.

Also included in this collection is a folder of materials on Eichhorn's honor as Quota Club Woman of the Year, folders with royalty statements from her various publishers, and a notebook that dates from her years at Woman's College containing manuscript music in her hand. Two original manuscripts are also included with the collection.