The World Mission in Church and Society records document the efforts of the office to support schools, hospitals, and missions established during the Church's early overseas involvement. Correspondence, minutes, reports, studies, newsletters, and informational materials are included.

This minimally processed collection is the archive of the Society of St. Margaret. The historical records of the Society are strongest in representing activities in several areas: the mother house in Boston, its governance and daily work routines, the work of St. Monica’s Home (including annual reports and other records), the Haiti mission in post-WWII years, the Duxbury convent and summer camp, and several of the houses and missions in other cities. There are also correspondence and diaries of individual sisters as well as a large photographic collection reaching back to St. Margaret’s Infirmary and the Children’s Hospital, both in Boston, and including many photos of the sisters both in portraiture and activities. The arrangement represents basic groups of records, but the collection has not yet been arranged into fonds and series.

The Haiti records contain correspondence, treasurer's records, pamphlets, photographs and miscellaneous reports. Of particular interest are the reports of the American Church Missionary Society regarding Haiti and the "Report of the Deputation to Investigate Conditions of the Haitian Church" of 1912.

This record group consists of seven hand-written documents which record the founding of the Dominican Episcopal Church in 1897, and the ordination of its leader, Benjamin I. Wilson, in 1898, under the aegis of the Haitian Orthodox Apostolic Church. Other historic documents, typescripts, and photographs represent the genesis and development of the Dominican Episcopal Church. Included are a “Covenant of Understanding” signed by Wilson and Bishop James Holly of the Haitian Church, and a testimonial in French signed by Monsieur A. Battiste, Chancellor of the Haitian Church. Also noteworthy are the Articles of Government of the Church of the Holy Trinity, a one-page document signed by representatives of the Church.