Transcripts by William Griffiths, Pontardawe ['Ifander'], in 1850-1852, of Yr Arweinydd Cerddorol, in two parts, by Richard Mills ['Rhydderch Hael'], and a collection of a hundred and fifty hymn-tunes selected by William Griffiths ('Tonau Cynulleidfaol sef Casgliad o 150 o donau wedi eu dethol fel y goreuon o wahanol gasgliadau, Pontardawe, 1860').

Gohebiaeth 'Alaw Ddu', 1870-1904; copïau llawysgrif o'i gyfansoddiadau cerddorol, yn cynnwys alawganau, 1878-1901, anthemau,1875-1903, emynau,1865-1895, caneuon crefyddol,1875-1896, caneuon seciwlar, 1879-[c. 1900], a darnau cerddorfaol, 1889-1899; ac eitemau amrywiol, 1879-1894 = Correspondence of 'Alaw Ddu', 1870-1904; manuscripts of his musical compositions, comprising cantatas, 1878-1901, anthems, 1875-1903, hymns, 1865-1895, religious songs, 1875-1896, secular songs, 1870-[c. 1900], and orchestral pieces, 1889-1899; and miscellaneous items, 1879-1894.

Teipysgrif traethawd gan awdur anhysbys, 1945, yn dwyn y teitl 'Emynwyr ac Emynyddiaeth yr Hen Ymneilltuwyr Cymreig (Annibynwyr, Bedyddwyr, Undodiaid) hyd at 1811', wedi ei ysgrifennu o dan y ffug-enw 'Piwritan' ar gyfer cystadleuaeth Gwobr Goffa Ieuan o Leyn yn Eisteddfod Genedlaethol Cymru Rhosllannerchrugog, 1945. = Typescript essay by an unnamed author, 1945, on the hymns and hymn writers of the Congregationalist, Baptist and Unitarian denominations in Wales to 1811, written under the pen-name 'Piwritan' for the 1945 National Eisteddfod in Rhosllannerchrugog.
Rhestrir y cynnwys ar ff. iv-v. Mae llythyr cyflwyno, [1956], oddi wrth y gwerthwr wedi ei bastio tu mewn i'r clawr blaen. = The contents are listed on ff. iv-v. A covering letter, [1956], from the seller is pasted in on the inside front cover.

Papurau Selyf Roberts, yn cynnwys erthyglau, 1947-1976; drama deledu,1982; sgyrsiau, darlithoedd a phregethau, 1950au-1980; gohebiaeth a dderbyniodd, 1951-1994; a thorion papur newydd, 1883-1964. = Papers of Selyf Roberts, including articles, 1947-1976; television drama, 1982; talks, lectures and sermons, 1950s-1980; correspondence received, 1951-1994; and newspaper cuttings, 1883-1964.