(1994)In The Case Books of Dr. John Snow, ix-xliii (Medical History, Supplement No. 14). London: Wellcome Institute for the History of Medicine, 1994
Online edition courtesy of the Wellcome Institute for the History of Medicine, via PubMed Central (NIH's free digital archive).
Ellis's Introduction offers a significant re-interpretation of Snow's life and work, based on archival research and assessments of relevant bibliography (fully notated) up to the early 1990s.