10 January – The vessels Constancia and Primus attempt to pass through a lock at Newport Docks at the same time and a collision results. The lock is blocked and the vessels already in the dock are trapped for nearly two weeks. The resulting losses eventually culminate in the demise of the Newport Dock Company a year later.
February – Charles Wilkins launches the English-language periodical The Red Dragon in Cardiff.
11 February – Six miners are killed in an accident at the Lewis Merthyr Colliery.
3 March – Five miners are killed in an accident at the Henwaen Colliery, Blaina.
^Edward Breese (1873). Kalendars of Gwynedd; or, Chronological lists of lords-lieutenant [&c.] ... for the counties of Anglesey, Caernarvon, and Merioneth. p. 24.
^ abcJ.C. Sainty (1979). List of Lieutenants of Counties of England and Wales 1660-1974. London: Swift Printers (Sales) Ltd.
^Nicholas, Thomas (1991). Annals and antiquities of the counties and county families of Wales. Baltimore: Genealogical Pub. Co. p. 695. ISBN9780806313146.
^Cylchgrawn Hanes Cymru. University of Wales Press. 1992. p. 169.
^Edwin Poole (1886). The Illustrated History and Biography of Brecknockshire from the Earliest Times to the Present Day: Containing the General History, Antiquities, Sepulchral Monuments and Inscriptions. Edwin Poole. p. 378.
^Edward Breese (1873). Kalendars of Gwynedd; or, Chronological lists of lords-lieutenant [&c.] ... for the counties of Anglesey, Caernarvon, and Merioneth. p. 26.
^Campbell, Thomas Methuen (2000). "C.R.M. Talbot 1803–1890". Morgannwg. 44: 66–104. Retrieved 17 May 2014.
^Edward Breese (1873). Kalendars of Gwynedd; or, Chronological lists of lords-lieutenant [&c.] ... for the counties of Anglesey, Caernarvon, and Merioneth. p. 29.
^James Henry Clark (1869). History of Monmouthshire. County Observer. p. 375.
^Fryde, E. B. (1996). Handbook of British chronology. Cambridge England: New York Cambridge University Press. p. 292. ISBN9780521563505.
^Thomas Duffus Hardy (1854). Fasti Ecclesiae Anglicanae: Or A Calendar of the Principal Ecclesiastical Dignitaries in England and Wales... University Press. p. 266.
^ abcThomas Duffus Hardy (1854). Fasti Ecclesiae Anglicanae: Or A Calendar of the Principal Ecclesiastical Dignitaries in England and Wales... University Press. p. 307.
^The Apostolical Succession in the Church of England. James Parkes and Company. 1866. p. 15.