Records of the headquarters of the Mothers' Union, Mary Sumner House, Westminster: minutes, correspondence, accounts, pamphlets, architectural plans, photographs and slides. The majority of the archive dates from when the Mothers' Union established a centralised structure in the 1890s, and contains a small number of papers from members who, although not always based at Mary Sumner House, played important roles within the MU (see MU/MSS/2). Although some files run into the 1990s, many of the series stop in the early 1980s, which coincides with a survey undertaken of the archive in Mary Sumner House (see MU/CO/1/127).
Contemporary terminology has been used to refer to the structure or offices of the MU: 'Home' members and dioceses refer to those in England, Wales, Scotland, Ireland and the Isle of Man. In the 1990s the acronym CWISY is employed to refer to members and dioceses within the provinces of Canterbury, Wales, Ireland, Scotland and York. Readers should also note that the catalogue contains some transcriptions of titles containing terms that are now politically incorrect.