Papers are arranged in five series, the first being correspondence of a personal or professional nature. Folders in this first series are arranged alphabetically by personal or corporate name.
The second series is comprised of correspondence between Carlotta Reiner and Fritz's children and their families, sent after Fritz's death.
The third series is made up of condolence letters sent to Carlotta after Fritz's death by correspondents whose names do not appear in the first series.
The fourth series is arranged by year and is made up of miscellaneous correspondence that reflects day-to-day issues, such as banking and travel confirmations and other household matters.
The fifth and final series is also arranged by year and includes all unidentified letters, primarily of a personal nature.