Chas. H Tillson, The Ordinances of the City of St. Louis, State of Missouri, Digested and Revised by the Common Council of Said City, in the Years 1860 & 1861: With the Constitution of the United States and the State of Missouri, and the Various Charters of the City of St. Louis Page 513, Image 513 (1861) available at The Making of Modern Law: Primary Sources.

Misdemeanors, § 8. Hereafter it shall not be lawful for any person to wear under his clothes, or concealed about his person, any pistol, or colt, or slung-shot, or cross-knuckles, or knuckles of lead, brass, or other metal, or bowie knife, dirk knife, or dirk, or dagger, or any knife resembling a bowie knife, or any other dangerous or deadly weapon, within the city of St. Louis; and whoever shall violate this ordinance shall be deemed guilty of a misdemeanor, and upon conviction shall forfeit and pay to this city not less than fifty dollars nor more than five hundred dollars for each and every offense, to be recovered as other penalties for misdemeanors. § 9. Nothing in this ordinance shall be so construed as to prohibit any United States, State, county or city officer from carrying and wearing such weapons as may be necessary in the proper charge of his duties.