106 A. 176 JOSHUA LEVERING ET AL., COMMITTEE OF THE LORD’S DAY ALLIANCE, ET AL., vs. GEORGE WEEMS WILLIAMS, GEORGE WASHINGTON WILLIAMS, J. COOKMAN BOYD AND EDWARD HANLON, CONSTITUTING THE BOARD OF PARK COMMISSIONERS. Court of Appeals of Maryland. Decided February 13th, 1919. Mandamus: to enforce public duty. Police powers: may not contravene general law. […]