While subgroup-level arrangement has been done in the past, this approach is generally discouraged. For certain collections that contain distinct groups of material, each comprising an intellectual whole (e.g. relating to different families, to different individuals within a family, or to an individual and an organization to which he or she is closely connected), it may be appropriate to arrange material into subgroups, rather than into separate collections. Subgroups within a collection may or may not be organized into series.
Beinecke manuscript collections that have been arranged in this manner include The Spinelli Archive (composed of several Italian family archives), the Rochambeau Family Archive (composed of one family member’s correspondence and writings files, and a multi-generational family cartographic archive), the Alfred Stieglitz/Georgia O’Keeffe Archive, and the Katherine S. Dreier Papers/Société Anonyme Archive.