Papers of Walter T. Morgan, 1833-1990, including family papers, 1904-1910; correspondence, 1951-1980; diaries, 1941-1989; research papers and notes relating to church history, in particular the diocese of St Davids; his University of Wales MA thesis, 'The consistory courts of the diocese of St Davids, 1660-1858; studies of the records of the courts illustrative of their work and practice' (1962); and miscellaneous notes, 1933-1990, on subjects including Iceland, Wales (especially Aberdare), German studies, and secular history.