Llythyrau oddi wrth Islwyn Ffowc Elis,
Llythyrau oddi wrth Islwyn Ffowc Elis,
Llawysgrifau Canolfan Llenyddiaeth Plant Cymru,
Llawysgrifau Canolfan Llenyddiaeth Plant Cymru,
Frank H. Cleaver Papers,
Frank H. Cleaver Papers,
Nodau clustiau defaid = : Sheep earmarks,
Nodau clustiau defaid = : Sheep earmarks,
Welsh clergy papers,
Welsh clergy papers,
Hymn-tunes
Hymn-tunes
Archif sioeau cerdd Cymru,
Archif sioeau cerdd Cymru,
Two Cycle Pivotal Engine Design,
Two Cycle Pivotal Engine Design,
Miscellanea of Thomas Darlington
Miscellanea of Thomas Darlington
John Kelsall : : extracts from manuscripts,
John Kelsall : : extracts from manuscripts,
Llawysgrifau cerddorol Llanofer,
Llawysgrifau cerddorol Llanofer,
Hunaniaeth Gymreig/Welsh identity,
Hunaniaeth Gymreig/Welsh identity,
Reverend D. R. Thomas papers,
Reverend D. R. Thomas papers,
Penpont Antiphonal,
Penpont Antiphonal,
Papers relating to the growth of Welsh Nationalism,
Papers relating to the growth of Welsh Nationalism,
Cymru Cuba,
Cymru Cuba,
Welsh entrepreneurs?,
Welsh entrepreneurs?,
Development of opthalmology in St Asaph,
Development of opthalmology in St Asaph,
Eigra Lewis Roberts 'Minafon' scripts,
Eigra Lewis Roberts 'Minafon' scripts,
Papers relating to temperance,
Papers relating to temperance,
