Research and original papers acquired by D. Rhys Phillips, mainly towards a history of the vale of Neath, 1622-1897, including extracts from the letter-books of Alfred Fox of the Neath Abbey Coal Co., 1820-1858, and accounts of the Vale of Neath Railway, 1850-1862; and material towards a history of Swansea, 1622-1814. Papers relating to Nonconformity, 1657-1921, music and hymn books, 1820-1933, Neath Abbey Coal Co., 1865-1874, dialect words, place names, tribannau Morgannwg, poetry, proverbs and folklore, 1896-1948. Correspondence, 1855-1951.