John Prentiss Poe, The Maryland Code. Public Local Laws, Adopted by the General Assembly of Maryland March 14, 1888. Including also the Acts of the Session of 1888 Incorporated Therein, and Prefaced with the Constitution of the State Page 468-469, Image 568-569 (Vol. 1, 1888) available at The Making of Modern Law: Primary Sources.
Concealed Weapons, § 30. Every person, not being a conservator of the peace entitled or required to carry such weapon as a part of his official equipment, who shall wear or carry any pistol, dirk-knife, bowie- knife, slung-shot, billy, sand-club, metal knuckles, razor, or any other dangerous or deadly weapon of any kind whatsoever, (penknives excepted,) concealed upon or about his person; and every person who shall carry or wear any such weapon openly, with the intent or purpose of injuring any person, shall, upon conviction thereof, be fined not more than five hundred dollars, or be imprisoned not more than six months in jail or in the house of correction.