Ch. 31—Parks and Public Grounds, § 6—Firearms and Missiles Prohibited, CHICAGO, LAWS AND ORDINANCES 88, 88-9 (Law Passed, 1866; Published, 1873 Bulletin Printing).
"6. FIREARMS AND MISSILES PROHIBITED—PROTECTION OF SHRUBBERY.] All persons are forbidden to carry firearms or to throw stones or other missiles within any one of the public parks. All persons are forbidden to cut, break or in any way injure or deface the trees, shrubs, plants, turf or any of the buildings, fences, bridges, or other construction or property, within or upon any of the said parks."
Murray F. Tuley, ed., Laws and Ordinances Governing the City of Chicago (Chicago, IL: The Bulletin Printing Co., 1873), 88-9. Chapter 31—Parks and Public Grounds, § 6—Firearms and Missiles Prohibited—Protection of Shrubbery. Revised Ordinance of 1866.