The Powys Society is a treasure trove of Powysiana.
Through its annual conference, events, journal and newsletter, the Society celebrates the work of John Cowper Powys alongside that of his literary brothers Theodore and Llewelyn and other fascinating family members. There is an international membership and an active programme of new publications.
The Society acts as steward to a large collection of manuscripts, typescripts, correspondence, paintings, photographs and memorabilia held at the University of Exeter and made available to researchers and readers.
There’s information on membership here.