Events from the year 1604 in Ireland.
- ^ Moody, T. W.; et al., eds. (1989). A New History of Ireland. 8: A Chronology of Irish History. Oxford University Press. ISBN 978-0-19-821744-2.
- ^ Cokayne, G. E.; Gibbs, Vicary; Doubleday, H. A.; White, Geoffrey H.; Warrand, Duncan; Howard de Walden, Thomas Scott-Ellis, eds. (2000), The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant (reprint), vol. I (new ed.), Stroud: Alan Sutton Publishing, p. 443, ISBN 978-0-904387-82-7