American Slave Trade: Or, An Account of the Manner in which the Slave Dealers Take Free People from Some of the United States of America, and Carry Them Away, and Sell Them as Slaves in Other of the States; and of the Horrible Cruelties Practised in the Carrying on of this Most Infamous Traffic: with Reflections on the Project for Forming a Colony of American Blacks in Africa, and Certain Documents Respecting that Project