Llythyrau,
Llythyrau,
Llythyrau, barddoniaeth, etc.,
Llythyrau, barddoniaeth, etc.,
Llythyrau, etc.,
Llythyrau, etc.,
'Mabinogion', etc.,
'Mabinogion', etc.,
Mannoethwy,
Mannoethwy,
Marwnad Peter Williams,
Marwnad Peter Williams,
Marwnad William Hughes, Llanengan, etc.,
Marwnad William Hughes, Llanengan, etc.,
Marwnad William Owen Pughe,
Marwnad William Owen Pughe,
Materials relating to Carmarthen,
Materials relating to Carmarthen,
Memorandum book
Memorandum book
'Merlin Cambrensis'
'Merlin Cambrensis'
Minute book of Cymmrodorion Society in Powys, etc.
Minute book of Cymmrodorion Society in Powys, etc.
Miscellanea
Miscellanea
Miscellanea
Miscellanea
Miscellanea
Miscellanea
Miscellanea,
Miscellanea,
Miscellanea,
Miscellanea,
Miscellanea,
Miscellanea,
Miscellanea,
Miscellanea,
Miscellanea,
Miscellanea,