Probably the best book written on this, particularly on the language of the domestic slave trade, is Walter Johnson's book called Soul by Soul, a book-- I highly recommend you read it sometime in your reading lives.

也许有一本书描写这点最生动,特别是在记述国内奴隶贸易的语言上,是沃尔特·约翰逊所著的,《灵魂的灵魂》这本书,我强烈建议在你的读书生涯中加进这本书

耶鲁公开课 - 美国内战与重建课程节选