| "Extraordinary landlordism in Western Donegal": Valentine Ryan, landlord, Inishkeel | Plunkett, Tom | Article in Journal | | 2022 |
| A Chronology of Midwest Donegal: The Civil Parishes of Inishkeel, Lettermacaward &. Killybegs Lower from Earliest Times to 2019 | Plunkett, Tom | Monograph or Collective Volume | Tom Plunkett | 2020 |
| Valentine Ryan: "A Beautiful Specimen of Tipperary Landlordism" | Plunkett, Tom | Article in Journal | | 2022 |
| Valentine Ryan: "A Beautiful Specimen of Tipperary Landlordism" Part 2 | Plunkett, Tom | Article in Journal | | 2023 |