Tuhia he tohutoro mō tēnei whārangi - Ina pā mai he mate nui
i puta i Rānana i te tau 1854, ka kohia e Dr. John Snow ngā raraunga mō ngā take takitahi, otirā ko tō rātou wāhi i Soho (Rānana), mā te whakamahi i ngā tikanga hou o te tātari mokowā me te aroturuki whakapā ki te whakatau ko te wai poke te pūkaha mate, ā, i angitu te whakaweto i te pūtake. Ko te mahere i haere tahi me tana ripoata 1855 i whakaatu i nga keehi takitahi, i whakapirihia ki ia waahi o te whare, e whakaatu marama ana i te kukume huri noa i te Pump Broad Street me nga waahi kei roto i etahi atu puna wai. I tenei wa ka whakamoemitihia te mahere hei kaupapa hurihuri; ahakoa ko tana mahi i roto i te rangahau ake me tona paanga ki te whakatau i te tautohetohe mo te take o te mate, he maha nga wa e kaha ana, e tika ana kia mohiotia mo te tirohanga a Snow ko te mahere te taputapu tino whai hua hei whakawhitiwhiti korero mo nga tauira mokowhiti o te mate.