Catholic Record Society

The Catholic Record Society (Registered Charity No. 313529), "the premier Catholic historical society in the United Kingdom", founded in 1904, is a scholarly society devoted to the study of Reformation and post-Reformation Catholicism in England and Wales. Particularly active members in its early years were Joseph Gillow, J. H. Pollen, and https://en.wikipedia.org/wiki/Joseph_Stanislaus_Hansom Joseph S. Hansom]. The society was initially established as a text publication society, with the aim of publishing Catholic historical records. Only later did it become a more general historical society. It has been credited with making much otherwise obscure archival material more readily available.

More information on the Wikipedia page.

The website is.