USA : Susan Schulten, Mapping the Nation, the website
United States. Area: Acquisition and Transfer of Territory 1780 to 1870
Map showing the distribution of the slave population of the Suthern states of the United States.
Compiled from the census of 1860. Drawn by E. Hergesheimer. Engr. by Th. Leonhardt.
Library of Congress, American Memory Map Collections -
Tin Eye en a trouvé 52 reproductions dont une sur le blog de la Library Of Congress (oct 2012)
Schulten writes that President Lincoln referred to this particular map often,
using it to understand how the progress of emancipation might affect Union troops on the ground.
The map even appears in the familiar Francis Bicknell Carpenter portrait
First Reading of the Emancipation Proclamation of President Lincoln,
visible leaning against a wall in the lower right-hand corner of the room.