Correspondence, bulletins, reports, questionnaires and miscellaneous material. Mostly correspondence, much of it dealing with individual countries or regions. See "International Secretariate" and "Material on Other Countries" Series for additional information. The material is arranged first by name of group (International Board, International Team, International Council) then by record type within each group and chronologically within record type.

The bulk of this series is made up of correspondence, but also included is reference material on the Nucleus and its functions, a questionnaire about certain beliefs and goals of the Nucleus, scattered reports and miscellaneous files. Material is arranged chronologically.

This series consists of major subseries: Missions, Africa, Asia, Australia, Canada, Caribbean, Europe, and Latin America. Each subseries is further divided into countries, regions or cities and within these by record type. Material is filed under the name of the country at the time the material was produced so there may be material on the same center under two different country names. Most material is in English, but the early material especially is in Dutch, German or French. The material contained is as diverse as the continents, countries and cities represented. Included are reports, correspondence, reference material, course and program material (lecture outlines, training aids, pamphlets, etc.) flyers, reprints of dramas presented, newspaper clippings, and subject files. Some areas of interest include reports written by Dutch Grail members in Holland at the time of Nazi occupation and the files dealing with the revolutions in Africa and Latin America. The file on England is also of special interest as the correspondence contains details of the English Grail's wartime activity. Although the English Grail still exists today, it is in name only. It is no longer a member of the International Grail having severed ties in the late 1940s.

The material within the series is arranged alphabetically by continent, region, country or city, then by record type and chronologically within each record type.