Steven Johnson addresses these omissions in The Ghost Map and brings forth aspects of John Snow’s life in an insightful, riveting manner.Johnson’s opening sentences provide a sense of what is to come: “It is August 1854, and London is a city of scavengers. What is not often conveyed is the social environment of the times or the role of Reverend Henry Whitehead in dealing with this fearsome outbreak. The mortality in this limited area probably equals any that was ever caused in this country, even by the plague and it was much more sudden, as the greater number of cases terminated in a few hours” ( 2).Although this 1854 outbreak is mentioned in many public health and epidemiology texts, the focus is usually on data gathering and presentation, and the actions taken to address the outbreak.

Within two hundred and fifty yards of the spot where Cambridge Street joins Broad Street, there were upwards of five hundred fatal attacks of cholera in ten days. Snow wrote: “The most terrible outbreak of cholera which ever occurred in this kingdom, is probably that which took place in Broad Street, Golden Square, and the adjoining streets, a few weeks ago. His “grand experiment” in 1854 (comparing cholera deaths in South London households that had consumed contaminated water with those that had not consumed contaminated water) is often considered a classic ( 2), but the Broad Street pump outbreak is perhaps the more famous historical account and is the subject of Steven Johnson’s new book, The Ghost Map. John Snow is among the most famous of public health figures ( 1). Widely viewed as the “father of contemporary epidemiology,” Dr.

Ghost map by steven johnson