In the story "Fever" from New Orleans, the line “he poured a thin layer of oil over his family’s water cistern” suggests several things about Lucien’s family and their circumstances.
Firstly, it indicates a level of care and concern for their water supply. During the time period the story is set in, waterborne diseases were a significant concern, particularly in warm climates where stagnant water could become a breeding ground for mosquitoes and other pests. By using oil to cover the water in the cistern, Lucien may be trying to protect his family's water source from contamination or from mosquito larvae, reflecting a certain awareness and proactive approach to health and hygiene.
Secondly, this action may also speak to the socio-economic conditions of Lucien's family. Maintaining a water cistern suggests that they might not have access to a consistent, clean water supply, which was common for many families in historical contexts. It implies that they are managing their resources carefully and are likely living in a community where clean water is not readily available.
Overall, this detail provides insight into Lucien's family as resourceful and vigilant in the face of health threats, highlighting the importance of their home environment in the context of the story's setting.