The files in this series are organized into two chief subseries: by name of circus and by topic. Within each subseries, the files are arranged alphabetically. The circus files contain articles, clippings, ephemera, etc. pertaining to specific circuses such as Clyde Beatty or Ringling Brothers. The subject files consist mainly of articles and ephemera on topics such as circus animals, clowns, etc. There is some overlap with the series called "Clippings" so both series should be consulted if researching a particular circus or topic.