29 June – physician and poet William Drennan, a leading figure in the Dublin Society of United Irishmen, is tried for seditious libel for circulating a pamphlet Address to the Volunteers in 1792; he is acquitted but withdraws from further direct political commitment.[3]
^McCutcheon, W. A. (1965). The Canals of the North of Ireland. Newton Abbot: David and Charles. ISBN 0-7153-4028-X.
^Moody, T. W.; Martin, F. X., eds. (1967). The Course of Irish History. Cork: Mercier Press. p. 374.
^McBride, I. R. (2004). "Drennan, William (1754–1820)". Oxford Dictionary of National Biography (Online ed.). Oxford University Press. doi:10.1093/ref:odnb/8046. Retrieved 2013-08-19. (subscription or UK public library membership required)
^Kirwan, Adrian James (2017). "R. L. Edgeworth and optical telegraphy in Ireland, c.1790–1805". Proceedings of the Royal Irish Academy. 117C. Dublin: 209–35.