The second of two volumes of manuscripts called Genealogical notes relating to the ancestry of the people called Quakers in Wales and Early meetings of the people called the Quakers in North Wales, Monmouthshire and Glamorganshire, by Thomas Allen Glenn, 1920.

The first of two volumes of manuscripts called Genealogical notes relating to the ancestry of the people called Quakers in Wales and Early meetings of the people called the Quakers in North Wales, Monmouthshire and Glamorganshire, by Thomas Allen Glenn, 1920.

A glossary of the Welsh of Glamorgan compiled by Thomas Morgan (1850-1939), Baptist minister at Skewen.

A manuscript containing sermons delivered at Bridgend and Coity, 1829-1830, by William Jones, Congregational minister (1784-1847).

'Casgliad o Ganeuon i Ychain Sir Morganwg', 1899, wedi eu casglu gan y Parch. Owen Davies Thomas (Owain Cyfelach), Pontarddulais. = A collection of Glamorgan cattle songs, 1899, collected by the Rev. Owen Davies Thomas (Owain Cyfelach), Pontarddulais.

Cyhoeddiadau a phapurau ymchwil G. J. Williams ar draddodiad llenyddol Morgannwg, gan gynnwys drafft llawysgrif o'r gyfrol Traddodiad Llenyddol Morgannwg (1948); ei draethawd buddugol ar feirdd Morgannwg yn Eisteddfod Genedlaethol Castell Nedd, 1918; darlithoedd ac erthyglau, [1911x1963]; a nodiadau amrywiol, [1911x1963].