Lincoln points out that the Kansas territorial legislature has passed a law prohibiting -- on penalty of death -- informing Black people of their legal rights. That's "The Act to Punish Offences Against Slave Property", passed ten days before Lincoln's letter.
https://www.kansasmemory.gov/item/display.php?item_id=6835&f=00972354
Morbidly fascinating how the law phrases that.
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