Serious Remonstrances: Addressed to the Citizens of the Northern States, and Their Representatives: Being an Appeal to Their Natural Feelings & Common Sense: Consisting of Speculations and Animadversions, on the Recent Revival of the Slave Trade, in the American Republic: with an Investigation Relative to the Consequent Evils Resulting from that Event. Interspersed with a Simplified Plan for Colonizing the Free Negroes of the Northern, in Conjunction with Those who Have, Or May Emigrate from the Southern States, in a Distant Part of the National Territory: Considered as the Only Possible Means of Avoiding the Deleterious Evils Attendant on Slavery in a Republic