| Celtic revivalist | Harbison, Peter | Article in Journal | | 2014 |
| Henry O'Neill of the 'Celtic Cross' : Irish antiquarian artist and patriot | Harbison, Peter | Monograph or Collective Volume | Wordwell | 2015 |
| Henry O'Neill: Addenda | Harbison, Peter | Article in Journal | | 2016 |
| The heirs of the O'Neills of the Fews. The first male line in descendants of Henry O'Neill and Hannah O'Kelly | O'Neill de Tyrone, Graziella | Article in Journal | | 2015 |
| The Irish Tercio and the Spanissh Army of Flanders, 1605-1620 | De Mesa, EduardoHazard, Benjamin | Article in Journal | | 2023 |