Mapping Cholera Data

How can cholera data from primary sources in the nineteenth century be visualized through mapping? The data for this research was gathered from the diaries of Joseph Svoboda, a resident of the region who traveled frequently up and down the river system and recorded information about numbers of deaths and quarantines from cholera in the cities he passed. This data was mapped using GIS software to geocode locations and include cities and other features as they appeared in the nineteenth century.