Copïau o lythyrau oddi wrth Eluned Morgan, Y Wladfa, Patagonia at 'John'. Rhoddwyd gan Mrs Mairos Ilma H. de Thomas, Gaiman ...,
David Jones letters to Tom Burns
Day book of Thomas Jones, Pencerrig
Diary of a nurse
Diary of Thomas Davenport Twist,
Diary, etc., of John Davies, Ystrad
East Denbighshire Recruiting Committee minutes,
Edward Thomas letters to O. M. Edwards
Ellis Humphrey Evans (Hedd Wyn): Barddoniaeth
Fifteen views illustrative of a tour to Hafod in Cardiganshire
First World War diary
First World War papers,
History of the Gwydir family,
Horae
Letter,
Letters addressed to H. Tobit Evans (1844-1908), Llanarth from Michael D. Jones and others, relating to the Welsh Colony in ...,
Letters to Abraham Ortelius,
Lewis Morris' De Historia Piscium
Llanrhystyd Soldiers Fund papers,
Llawysgrif Boston o Gyfreithiau Hywel Dda