Redleg,
Slavery in Maryland did not end with the 13th Amendment. Near the end of 1864 (yes, Maryland was exempt from the Emancipation Proclamation) Lincoln forced the Maryland legislator to change the State constitution from Slave to Free, which (in a clearly rigged process) they did.
Slavery in Maryland officially ended on November 1st, 1864 with the adoption of the new state constitution.
