| Contemporary sources for Essex's lieutenancy in Ireland, 1599 | Kenny, L. W. | Article in Journal | | 1958 |
| Contemporary sources for Essex's lieutenancy in Ireland, 1599 | Henry, L. W. | Article in Journal | | 1958 |
| Elizabeth and Essex : a tragic history | Strachey, Giles Lytton, 1880-1932 | Monograph or Collective Volume | | 1948 |
| Elizabeth I : war and politics, 1588-1603 | MacCaffrey, Wallace T. | Monograph or Collective Volume | | 1992 |
| Robert, earl of Essex : an Elizabethan Icarus | Lacey, Robert | Monograph or Collective Volume | Weidenfeld and Nicolson | 1971 |
| Shakespeare, Spenser, and the crisis in Ireland | Highley, Christopher | Monograph or Collective Volume | Cambridge University Press | 1997 |
| The earl of Essex and Ireland, 1599 | Henry, L. W. | Article in Journal | | 1959 |
| The earl of Essex as strategist and military organizer (1596-7) | Henry, L. W. | Article in Journal | | 1953 |
| The green cockatrice | Iske, Basil | Monograph or Collective Volume | Meath Arch. & Historical Soc. | 1978 |
| The Pass of the Plumes | O'Carroll, Donal | Article in Journal | | 2012 |
| The Pass of the Plumes | O'Carroll, Donal | Article in Journal | | 2012 |
| The Raleigh-Essex rivalry and 'Mother Hubberd's Tale' | Mount, Charles | Article in Journal | | 1950 |
| Trial for treason | Keeton, G. W. | Monograph or Collective Volume | | 1959 |