Llyfr Aneirin
The Merthyr Fragment
Llawysgrif Boston o Gyfreithiau Hywel Dda
Horae
Llawysgrif Hendregadredd
Lewis Morris' De Historia Piscium
Llyfr Melyn Tyfrydog
Day book of Thomas Jones, Pencerrig
Diary, etc., of John Davies, Ystrad
Memoirs of Thomas Jones, Pencerrig
Soldier's autobiography
Llythyrau o ryfel cartref yr America
Barddoniaeth
Edward Thomas letters to O. M. Edwards
David Lloyd George notebook
Diary of a nurse
First World War diary
London Welsh Battalion: Committee minutes
Royal Welsh Fusiliers
David Jones letters to Tom Burns