John Chaloner Smith, British mezzotinto portraits, vol. 1, London 1883, pp. 55-60 (list of mezzotints by E. Bell) and addendum in vol. 4.2, London 1883, p. 1791 ("17a. John Wasdale. S. Williams. H. L., directed towards left, wig, white cravat, frill, medical books to left, curtain at back. Under, Soln Williams Ac Ctem pinxit. Edwd Bell sculpsit 1797. John Wasdale, M.D. … Practised in Carlisle and London; at the coronation of George III, travelled from Carlisle to London on horseback in twenty-eight hours. He died at his house in New-street, Spring Garden, 6th June, 1807, aged 76")
R. Burgess, Portraits of doctors & scientists in the Wellcome Institute, London 1973, no. 3118.1
