27 September - Francis Homfray leases a mill from Anthony Bacon of Cyfarthfa ironworks. (Under the terms of a new Parliamentary Act, Bacon, as an MP, is disqualified from holding government munitions contracts.)
William Gilpin - Observations on the River Wye and several parts of South Wales, etc. relative chiefly to Picturesque Beauty; made in the summer of the year 1770[19]
25 August - Lady Catherine Hamilton, formerly Catherine Barlow of Colby, heiress to an estate in south Pembrokeshire which passed to her nephew Charles Francis Greville[25]
^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.
^Edward Breese (1873). Kalendars of Gwynedd; or, Chronological lists of lords-lieutenant [&c.] ... for the counties of Anglesey, Caernarvon, and Merioneth. p. 24.
^ abcdeJ.C. Sainty (1979). List of Lieutenants of Counties of England and Wales 1660-1974. London: Swift Printers (Sales) Ltd.
^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.
^Nicholas, Thomas (1991). Annals and antiquities of the counties and county families of Wales. Baltimore: Genealogical Pub. Co. p. 612. ISBN9780806313146.
^Edward Breese (1873). Kalendars of Gwynedd; or, Chronological lists of lords-lieutenant [&c.] ... for the counties of Anglesey, Caernarvon, and Merioneth. p. 29.
^Jonathan Williams (1859). The History of Radnorshire. R. Mason. p. 115.
^Tobias Smollett, ed. (1775). The Critical Review: Or, Annals of Literature. R[ichard]. Baldwin, at the Rose in Pater-noster-Row. p. 159.
^John Henry James (1898). A History and Survey of the Cathedral Church of SS. Peter, Paul, Dubritius, Teilo, and Oudoceus, Llandaff. Western Mail. p. 16.
^The Apostolical Succession in the Church of England. James Parkes and Company. 1866. p. 15.
^Thomas Duffus Hardy (1854). Fasti Ecclesiae Anglicanae: Or A Calendar of the Principal Ecclesiastical Dignitaries in England and Wales... University Press. p. 305.
^The Monthly Review Or Literary Journal Enlarged. Porter. 1780. p. 95.
^Michael Levey; Sir Thomas Lawrence; National Portrait Gallery (Great Britain) (1979). Sir Thomas Lawrence, 1769-1830. National Portrait Gallery.