Papurau'r Parch. William Rhys Watkin, yn cynnwys nodiadau pregethau a phapurau eraill,1899-1936; gohebiaeth, 1878-1948, blwyddlyfrau printiedig Undeb Bedyddwyr Cymru yn cynnwys cofnodion gan WRW, 1891-1945; nodiadau ymchwil ac erthyglau ar Bedo Brwynllys, y Parch. E. T. Jones, a hanes y Bedyddwyr, 1909-[1945], a llyfr nodiadau Pwyllgor yr Eisteddfod Genedlaethol, Llanelli,1928-1931; a chofnodion a gasglwyd ganddo, gan gynnwys cofnodion a chyfrifon eglwysi'r Bedyddwyr yn sir Gaerfyrddin a Morgannwg, 1843-930; nodiadau pregethau a phapurau eraill Richard Davies ('Yr Hen Belican'),1816-1873; papurau a llyfrau nodiadau amrywiol yn ymwneud รข'r Bedyddwyr Cymraeg, 1787-1896; a phapurau Thomas Jones, morwr, o Aberdaugleddau, sir Benfro, 1845-1900 = Papers of Rev. William Rhys Watkin, including sermon notes and other papers, 1899-1936; correspondence, 1878-1948, printed Baptist Union of Wales yearbooks containing entries by WRW, 1891-1945; research notes and articles on Bedo Brwynllys, the Rev. E. T. Jones, and Baptist history, 1909-[1945], and notebook of the National Eisteddfod Committee, Llanelli, 1928-1931; and records collected by him, including minutes and accounts of the Welsh Baptist Church, Eldon Street, Moorfields, London, 1846-1905; records of Baptist churches in Carmarthenshire and Glamorgan, 1843-1930; sermon notes and other papers of Richard Davies ('Yr Hen Belican'), 1816-1873; miscellaneous papers and notebooks relating to Welsh Baptists, 1787-1896; and papers of Thomas Jones, mariner, of Milford Haven, Pembrokeshire, 1845-1900.
Watkin, W. R. (William Rhys), 1875-1947
