Letters to R. J. Derfel,
Letters to R. J. Derfel,
Cerddi a phregethau,
Cerddi a phregethau,
'Declaration of Principles', &c.,
'Declaration of Principles', &c.,
'Enwogion Cymru',
'Enwogion Cymru',
Scrap album,
Scrap album,
Miscellanea,
Miscellanea,
Letters relating to R. J. Derfel,
Letters relating to R. J. Derfel,
Robert Jones Derfel MSS,
Robert Jones Derfel MSS,
Pregethau,
Pregethau,
Scrap-books,
Scrap-books,
T. J. Roberts: papers relating to R. J. Derfel,
T. J. Roberts: papers relating to R. J. Derfel,
