445

Anthony R. Mawson, "The Hands of John Snow: Clue to His Untimely Death?" Journal of Epidemiology & Community Health 63, no. 6 (2009): 497–99.

446

David E. Lilienfeld, "John Snow: The First Hired Gun?" American Journal of Epidemiology 152, no. 1 (2000): 4–9; Johnson, The Ghost Map, 67.

447

Mawson, "The Hands of John Snow."

448

S. W. B. Newsom, "Pioneers in Infection Control: John Snow, Henry Whitehead, the Broad Street Pump, and the Beginnings of Geographical Epidemiology," The Journal of Hospital Infection 64, no. 3 (2006): 210–16.

449

Nigel Paneth et al., "A Rivalry of Foulness: Official and Unofficial Investigations of the London Cholera Epidemic of 1854," American Journal of Public Health 88, no. 10 (1998): 1545–53.

450

Lilienfeld, "John Snow."

451

Ibid.

452

Mawson, "The Hands of John Snow."

453

Lilienfeld, "John Snow."

454