So he wouldn't get lost and wind up in Small Pox.

John Snow discovered cholera in 1852, from contaminated water.

The great physician from London, Dr. john Snow proved the same in 1854. He made a map of patients from Broad street (now Broadwick street) of Soho district, London.

he stopped it by tracking down loads of people in1854 and found they all drank from a well john snow soon tracked down the well and with the evidence he had he shut the well down and cholera had gone he had saved the day

Name of Dr. John snow is permanently associated with the cholera. He was a physician in London. Dr. John Snow prepared the dot map of the cholera patients. He could locate the origin of cholera on Broad street (now Broadwick street) of Soho district of London. Almost all the patients had consumed water from one particular pump. Some monks from the area were not affected by cholera. But then, they did not used the water for drinking. But instead they used to consume beer to quench the thirst. The theory was not accepted immediately. But then, you can not hide the truth for long. Just like that, you can not hide the sun with your hands.