Columbia subject headings:
Christian pilgrims and pilgrimages--Ireland--Derg, Lough (Donegal)--Early works to 1800.
Patrick, Saint, 373?-463?--Legends.
Purgatory in literature.
Purgatory--Early works to 1800.
Saint Patrick's Purgatory (Ireland)--In literature.
Harvard subject headings:
Christian pilgrims and pilgrimages--Ireland--Derg, Lough (Donegal)--Early works to 1800.
Patrick, Saint, 373?-463?--Legends.
Purgatory in literature
Purgatory--Early works to 1800
Saint Patrick's Purgatory (Ireland)--In literature.
Princeton subject headings:
Christian pilgrims and pilgrimages--Ireland--Derg, Lough (Donegal)--Early works to 1800.
Legends.
Patrick, Saint, 373?-463?--Legends.
Purgatory in literature.
Purgatory--Early works to 1800.
Saint Patrick's Purgatory (Ireland)--In literature.