Baltimore is south of the Mason-Dixon line. Mason and Dixon surveyed the border between Pennsylvania, Maryland, and Delaware.
In the mid-19th century, Maryland was a slave state but did not secede and join the Confederacy. Enslaved Marylanders were, thus, not freed by the Emancipation Proclamation in 1863, since that only targeted seceding states under Union Army occupation. Slavery in Maryland ended in 1864 with the adoption of a new state constitution.
Necromancers imply the existence of necplatonics.