One of the main diseases of the day was Yellow Fever, anthropomorphosized as "Yellow Jack"- spread by mosquitos, it often resulted in the wealthy evacuating the city in the Summers, leaving the poor to suffer heat and pestillence.
Despite the reputation for "laissez le bon temp roulez," the main faith of NO was Catholosism...and Catholics comprised most of the population overall- so the choice of a "monothestic" faith as predominant in your version is pretty accurate.
Oh- thought of another one to check out: While not set in NO, Poe's "The Murders in the Rou Morgue" WAS set in 1840's Paris...pretty close in some ways, at least culturally.
(http://bau2.uibk.ac.at/sg/poe/works/murders.html)
Despite the reputation for "laissez le bon temp roulez," the main faith of NO was Catholosism...and Catholics comprised most of the population overall- so the choice of a "monothestic" faith as predominant in your version is pretty accurate.
Oh- thought of another one to check out: While not set in NO, Poe's "The Murders in the Rou Morgue" WAS set in 1840's Paris...pretty close in some ways, at least culturally.
(http://bau2.uibk.ac.at/sg/poe/works/murders.html)