Series was prepared by des Varennes with documents and personal items for her biography on Henriette Renié. The majority of the series is composed of correspondence, but also includes concert programs, manuscripts, published items and documents.

Series includes professional and private recordings of Renié's compositions. Private recordings are on 78 rpm discs with many duplicates. Professional recordings are from Columbia and Odéon with 78 rpm discs with many duplicates. The series also contains three metal disc matrices used as masters for producing copies of private recordings. There are also two magnetic tape reels with music from the Columbia and Odéon recordings.

Series contains items grouped by des Varennes with no apparent arrangement. Contains the largest amount of correspondence when compared to other series in the collection, many of which were written by famous composers and musicians to Henriette Renié. Materials also include photographs and Renié's spritual diary entries written on small pieces of paper (different from spiritual diary carnets in Series IV).

Series contains items arranged by Françoise des Varennes in preparation for the Henriette Renié biography. Materials include chapters for des Varennes' book in addition to photos, selected spiritual diary entries, and periodical articles written by and about Renié.

Series contains handwritten diary carnets written by Renié with spiritual reflections and notes from Catholic Mass sermons, which she attended on a daily basis.