Although he had no formal medical education, the epidemiology of cholera intrigued Reverend Whitehead. So who was this religious leader and how did he get interested in cholera? [SOURCE] REVEREND WHITEHEAD Reverend Henry Whitehead (1825-96), shown here in 1884 at age 59, was born on September 22,1825 in the seaside town of Ramsgate (middle center […]

It is 1854 Victorian London and it stinks. Scavengers lived in a world of excrement and death. Unorganized, independent scavengers referred to as bone-pickers, rag-gathers, pure-finders, dredgermen, mud-larks, sewer-hunters, dustmen, night-soil men, bunters, toshers and shoreman spread out in the London nights in search of organic materials to use to make money or for trade. “Pure” […]

John Grimwade is graphics director of Condé Nast Traveler magazine (based in New York) and has his own information graphics business (www.johngrimwade.com). He has produced infographics for more than 30 major magazines and several books. Before moving to the United States, he worked for 14 years in newspapers in London (including six years as head […]

As I near completion of Steven Johnson’s thrilling book, The Ghost Map, I thought I would pause and celebrate the 200th birthday of Dr. John Snow, who created the now famous map that helped identify the cause of the 1854 cholera epidemic in London. I am hoping next weekend to start my multi-part series about […]

One of my favorite data visualizations of all time is John Snow’s “Ghost Map” that helped identify the cause of the 1854 London cholera epidemic. I am currently reading Steven Johnson’s exciting book on this tragic chapter in London’s history. The book is titled The Ghost Map: The Story of London’s Most Terrifying Epidemic – […]