Letters on the Colonization Society : with a view of its probable results, under the following heads : the origin of the society, increase of the coloured population, manumission of slaves in this country, declarations of legislatures, and other assembled bodies, in favour of the Society, situation of the colonists at Monrovia, and other towns, moral and religious character of the settlers, soil, climate, productions, and commerce, of Liberia, advantages to the free coloured population, by emigration to Liberia, disadvantages of slavery to the white population, character of the natives of Africa before the irruptions of the barbarians, effects of colonization on the slave trade, with a slight sketch of that nefarious and accursed traffic : addressed to the Hon. C.F. Mercer /