S. Baring-Gould, Cornish Characters and Strange Events (John Lane/Bodley Head, London and New York 1909), pp. 375–76.
A propos The Quaker, it is amusingly related that Incledon, finding himself in Margate to play Mr Steady without a suitable costume, induced a 'comfortable plump-looking Quaker' whom he met in the street to lend him his clothes for the night: and the Quaker attended the performance from a hidden vantage, to see how his people were represented. See Mrs Mathews, Memoir of Charles Mathews, Comedian (Richard Bentley, London 1838), Vol. 2, pp. 201–03 (Internet Archive).
His vanity caused his friends to play practical jokes on him, see Mathews, Memoirs of Charles Mathews, Comedian, 2 Vols (Richard Bentley, London 1838), Vol. 2, pp. 161–167 (Internet Archive).
W.H. Tregellas, 'Incledon: The Singer', in Cornish Worthies. Sketches of Eminent Cornish Men and Families, 2 volumes (Elliot Stock, London 1884), II, pp. 89-112 (Google).
William Parke, Musical Memoirs (Henry Colburn and Richard Bentley, London 1830), vol. 1, p. 127 (Google).
Parke, Musical Memoirs (1830), vol. 1, p. 136 (Google).
Parke, Musical Memoirs (1830), vol. 1, pp. 187–88 (Google).
Parke, Musical Memoirs (1830), vol. 2, p. 249 (Google).
Parke, Musical Memoirs (1830), vol. 1, p. 253–54 (Google).
Parke, Musical Memoirs (1830), vol. 1, p. 282 (Google).
Parke, Musical Memoirs (1830), vol. 1, p. 291 (Google).
Parke, Musical Memoirs (1830), vol. 1, p. 304–06 (Google).
Parke, Musical Memoirs (1830), vol. 1, p. 324 (Google).
Parke, Musical Memoirs (1830), vol. 2, p. 250 (Google).
P. Drummond, The Provincial Music Festival in England, 1784–1914 (Ashgate Publishing, 2013), p. 175; M. Argent (Ed), The Recollections of R.J.S. Stevens: An organist in Georgian London (Abridged edition) (SIU Press, 1992), pp. 293–94; see Wikisource