not a product of Miasma. "There was nothing in the air to account for the spread of cholera". According to Snow, cholera was spread by persons ingesting a substance, not through atmospheric transmittal. Snow cited a case of two sailors, one with cholera and one without. Eventually the second became sick as well from accidentally ingesting bodily fluids of the first. Involvement of Henry Whitehead The Reverend Henry Whitehead was an assistant curate at St. Luke's church in Soho during the 1854 cholera outbreak. A former believer in the miasma theory of disease, Whitehead worked to disprove false theories. He was influenced by Snow's theory that cholera spreads by consumption of water contaminated by human waste. Snow's work, particularly his maps of the Soho area cholera victims, convinced Whitehead that the Broad Street pump was the source of the local infections. Whitehead joined Snow in tracking the contamination to a faulty cesspool and the outbreak's index case (the baby with cholera). Whitehead's work with Snow combined demographic study with scientific observation, setting an important precedent for epidemiology. Board of Health The Board of Health in London had several committees, of which the Committee for Scientific Inquiries was placed in charge of investigating the cholera outbreak. They were to study the atmospheric environment in London; however, they were also to examine samples of water from several water companies in London. The committee found that the most contaminated water supply came from the South London water companies, Southwark and Vauxhall. As part of the Committee for Scientific Inquiries, Richard Dundas Thomson and Arthur Hill Hassall examined what Thomson referred to as "vibriones". Thomson examined the occurrence of vibriones in air samples from various cholera wards and Hassall observed vibriones in water samples. Neither identified vibriones as the cause of cholera. As part of their investigation of the cholera epidemic, the Board of Health sent physicians to examine in detail the conditions of the Golden Square neighbourhood and its inhabitants. The Board of Health ultimately attributed the 1854 epidemic to miasma. Dr Edwin Lankester's evaluation Dr Edwin Lankester was a physician on the local research conglomerate that studied the 1854 Broad Street Cholera Epidemic. In 1866, Lankester wrote about Snow's conclusion that the pump itself was the cause of the cholera outbreak. He agreed with Snow at the time; however, his opinion, like Snow's, was not publicly supported. Lankester subsequently closed the pump