William Borlase, Observations on the Antiquities Historical and Monumental, of the County of Cornwall. Consisting of several essays on the first inhabitants, Druid superstition, and remains of the most remote antiquity, in Britain, and the British Isles, Oxford : W. Jackson, 1754

William Borlase, The Natural History of Cornwall: The Air, Climate, Waters, Rivers, Lakes, Sea and Tides; of the stones, semimetals, Metals, TIN, and the Manner of Mining; the Constitution of the Stannaries; Iron, Copper, Silver, Lead, and Gold, found in Cornwall, Oxford : W. Jackson, 1758

James Boswell, 'Jaunt to Cornwall', The Private Papers of James Boswell from Malahide Castle, 18 vols., 1928–34

R.W. Brunskill, Traditional Buildings of Britain: An Introduction to Vernacular Architecture, London : Gollancz, 1992

H.M. Colvin, A Biographical Dictionary of British Architects 1600–1840, 4th edn., London : Yale University Press, 2008

Cornwall Record Office (CRO), Truro

Allan Cunningham, The Lives of the Most Eminent British Painters, Sculptors, and Architects, 6 vols. , London : John Murray, 1829–33

Pamela Dodds, 'The Hawkins of Trewithen and Thomas Edwards of Greenwich', Journal of the Royal Institution of Cornwall, n.s. 2, vol. 3, part 2, 1999

A.J. Finberg, 'The Notebooks of George Vertue relating to Artists and Collections in England', The Walpole Society, vol. 22, 1933–4

Terry Friedman, James Gibbs, New Haven and London : Yale University Press, 1984

Davies Gilbert, The Parochial History of Cornwall: Founded on the Manuscript Histories of Mr. Hals and Mr. Tonkin; with Additions and Various Appendices, London : J.B. Nicholas and Son, 1838

Algernon Graves and William Vine Cronin, A History of the Works of Sir Joshua Reynolds P.R.A., 1–4, London : Henry Graves and Co., 1899–1901

Stephen Gwynn, Memorials of an Eighteenth Century Painter (James Northcote), London : T. Fisher Unwin, 1898

William Hazlitt, Conversations of James Northcote, Esq. R.A., London : Henry Colburn and Richard Bentley, 1830

E. Henderson, Life of James Ferguson FRS in a brief Autobiographical Account and further extended Memoir, Edinburgh, London and Glasgow : A. Fullarton & Co., 1867

Paul Holden, 'Trewithen and the Brettingham Plans', The Georgian Group Journal, vol. 21, 2011

Paul Holden, 'Trewithen, near Truro in Cornwall', Country Life, 29 May 2013

Christopher Hussey, 'Trewithen, Cornwall', Country Life, 2 & 9 April 1953

John H. B. Irving, The Hawkins of Trewithen: Their Ancestors and their Descendants, Castle Cary : Castle Cary Press, 1990

Alex Kidson, George Romney: A Complete Catalogue of his Paintings, 3 vols., New Haven and London : Yale University Press, 2015

Charles Robert Leslie and Tom Taylor, Life and Times of Sir Joshua Reynolds, 2 vols. , London : John Murray, 1865

David Mannings and Martin Postle, Joshua Reynolds: A Complete Catalogue of his Paintings, 2 vols., New Haven and London : Yale University Press, 2000

Morrab Library, Penzance

James Northcote, The Life of Sir Joshua Reynolds, LL D, F.R.S F.S.A. &c. Late President of the Royal Academy. Comprising Original Anecdotes of Many Distinguished Persons, His Contemporaries; and a Brief Analysis of his Discourses, 2 vols., London : Henry Colburn, 1819

Stamford Raffles-Flint, Mudge Memoirs: being a record of Zachariah Mudge, and some members of his family; together with a genealogical list of the same. Compiled from Family Papers & Other Sources, Truro : Netherton & Worth, 1883

Royal Institution of Cornwall, Truro

Jacob Simon, The Account Book of James Northcote, 58, The Walpole Society, 1996

Alastair Smart, Allan Ramsay: A Complete Catalogue of his Paintings, ed. ed. John Ingamells, New Haven and London : Yale University Press, 1999

Trewithen House Archive

George Vertue, 'Note Books III', The Walpole Society, ed. Lionel Cust, vol. 22, 1934

Ellis Waterhouse, Reynolds, London : Phaidon Press Ltd., 1973