π
8 September 1854
After Snow presented evidence about cholera cases, the local authorities disabled the water pump.
π
8 September 1854
The removal was a public-health response to a concentrated Soho outbreak.
π
8 September 1854
His household interviews and mapping supplied evidence for the decision to stop using the pump.
π
8 September 1854
The outbreak had already begun to subside when the handle was removed; the episode supported later work on waterborne disease.