16 February – Six million tons of rock collapse at the Welsh Slate Company's underground quarry at Blaenau Ffestiniog.
1 February – Five miners are killed in an accident at the Lewis Merthyr Colliery.
25 June – Six miners are killed in an accident at the New Duffryn Colliery, Rhymney.
July – The steamship Rishanglys leaves three seamen, who are believed to be suffering from cholera, on the island of Flat Holm; one of them subsequently dies.[19]
21 August – Five miners are killed in an accident at the Gelli Colliery, Gelli, Glamorgan.
^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.