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 to the citizens of the northern states 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