[190] A Popular Summary of Vaccination with reference to its Efficacy and Probable Cause of Failure. By John Marshall, M.R.C.S. and District Vaccinator of the National Vaccine Establishment. London, 1830. Pp. 96.
[191] Inquiry, 1798, p. 7.
[192] Ibid., p. 58.
[193] Petition to the House of Commons, 1802.
[194] Jenner to Dunning, 23rd Dec., 1804. Baron’s Life of Jenner, vol. ii. p. 26.
[195] Facts for the most part unobserved, or not duly noticed respecting Variolous Contagion. London, 1808, 4to, pp. 17.
[196] A Continuation of Facts and Observations relative to Cowpox. By Edward Jenner, M.D. London, 1801.
[197] Baron’s Life of Jenner, vol. ii. p. 28.
[198] Baron’s Life of Jenner, vol. i. p. 449.
[199] Ibid., vol. ii. p. 344.