Riegel's correspondence in this series is primarily between different awards administrators and judges. Riegel corresponded with approximately 320 different individauls within this subseries. Correspondents of note include Mrs. Dupont, Turner Catledge, and Sol Taishoff.

The Outpost Services Bureau provided support to govenrment agencies in ensuring their ability to function via connecting them with lines of communication and providing support when necessary. They created monthly progress reports of various outpost stations reporting the status of these stations and their effectiveness.

The Journalism 101 course focused on the principles of Journalism. Within this subseries are documents related to the course including syllabi, class handouts, quizzes, exams, and other materials Riegel had that were relevant to the course.

Items in this series pertain to Riegel's personal correspondence between himself and colleagues, friends, and family. Some material is related to or mentions his work, but the majority of the material is about his or other people's personal lives, opinions, and thoughts around world events.