With the Union forces in Maryland still deeply worried about the divided loyalties of Maryland and its largest city, troops of the Philadelphia Regiment, acting on orders from General Nathaniel P. Banks, swooped in the early morning hours to arrest Baltimore's four Police Commissioners in their homes. Charles Hinks, Charles Howard, William H. Gatchell, and John W. Davis. All but Hinks, who was in bad health were detained for more than a year, first at Fort McHenry and then at Fort Warren in Boston Harbor in Massachusetts. (By John Osborne)