Leovy, Henry Jefferson, et al. The laws and general ordinances of the city of New Orleans : together with the acts of the Legislature, decisions of the Supreme Court and constitutional provisions relating to the city government. Printed by E.C. Wharton, 1857. Sabin Americana: History of the Americas, 1500-1926

Evening Gun. No. 251. That the captains of police of the first, second, third and fourth districts be, and are hereby, instructed to purchase the powder necessary for firing the evening guns in said districts, and present the vouchers for the same, after they have been approved by the chief of police, and it shall be the duty of the said captains to detail a member of the police force of each of said districts to fire the said evening guns, without extra compensation.

Available at https://link-gale-com.proxy.lib.duke.edu/apps/doc/CY0108981050/SABN?u=duke_perkins&sid=SABN&xid=5cff6ac4. Accessed 10 Jan. 2020.