Edward Tufte forum: A visit to John Snow's cholera-infected waterpump in LondonA visit to John Snow's cholera-infected waterpump in London On a walk early Saturday evening June 17 in London I visited the John Snow pub, which is mentioned in my account of the 1854 cholera epidemic in Visual Explanations , pp. 27-37. This is the site https://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=0002Je