This anti-slavery map was first published in 1837, before the annexation of Texas and republished several times up to 1857. It shows the slave states in black, with black-and-white shading representing the threatened spread of slavery into Texas and the western territories.
Ames, Julius Rubens. 1847. The Legion of Liberty and Force of Truth, Containing the thoughts, words, and deeds, of some prominent Apostles, Champions and Martyrs. New York: American Anti-Slavery Society, 10th ed. Cornell University: Persuasive Cartography: The PJ Mode Collection
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