O. E. Roberts Papers
O. E. Roberts Papers
O. Gilbert Davies collection of Denbighshire and Shropshire deeds
O. Gilbert Davies collection of Denbighshire and Shropshire deeds
O. M. Edwards Papers,
O. M. Edwards Papers,
'O. M. Edwards',
'O. M. Edwards',
O. P. Hughes Collection of Merionethshire Gold Mining Records,
O. P. Hughes Collection of Merionethshire Gold Mining Records,
O. T. Jones Manuscripts,
O. T. Jones Manuscripts,
O. T. Jones MSS (Additional)
O. T. Jones MSS (Additional)
Objects seen from Aberystwyth
Objects seen from Aberystwyth
Observations at Hafod Copper Works. Green leather. Donated by Captain Hugh Vivian, Bishopston, January 1950,
Observations at Hafod Copper Works. Green leather. Donated by Captain Hugh Vivian, Bishopston, January 1950,
Observations upon the picturesque scenery of North Wales
Observations upon the picturesque scenery of North Wales
Ochr y Fron mine, &c.: accounts,
Ochr y Fron mine, &c.: accounts,
October 1918,
October 1918,
October,
Oculus Sacerdotis (a manual on canon law and theology),
Oculus Sacerdotis (a manual on canon law and theology),
Offerynnau Statudol Cymru = Welsh Statutory Instruments
Offerynnau Statudol Cymru = Welsh Statutory Instruments
Office day book of Daniel Price, solicitor, of Talley
Office day book of Daniel Price, solicitor, of Talley
Officers of Glamorganshire
Officers of Glamorganshire
Officers of regiments connected with Wales
Officers of regiments connected with Wales
Officium Hebdomadae Sanctae,
Officium Hebdomadae Sanctae,
Officium mortuorum,
Officium mortuorum,
