"Statistics are far from being the barren array of figures ingeniously and laboriously combined into columns and tables, which many persons are apt to suppose them. They constitute rather the ledger of a nation, in which, like the merchant in his books, the citizen can read, at one view, all of the results of a year or of a period of years, as compared with other periods, and deduce the profit or the loss which has been made, in morals, education, wealth or power." Impressed with a sense of the propriety of introducing, in this as well as in the succeeding chapters of our work, a number of tabular statements exhibiting the comparative growth and prosperity of the free and slave states, we have deemed it eminently proper to adduce the testimony of these distinguished authors in support of the claims which official facts and accurate statistics lay to our consideration. And here we may remark that the statistics which we propose to offer, like those already given, have been obtained from official sources, and may, therefore, be relied on as correct. The object we have in view in making a free use of facts and figures, if not already apparent, will soon be understood. It is not so much in its moral and religious aspects that we propose to discuss the question of slavery, as in its social and political character and influences. To say nothing of the sin and the shame of slavery, we believe it is a most expensive and unprofitable institution; and if our brethren of the South will but throw aside their unfounded prejudices and preconceived opinions, and give us a fair and patient hearing, we feel confident that we can bring them to the same conclusion. Indeed, we believe we shall be enabled--not alone by our own contributions, but with the aid of incontestable facts and arguments which we shall introduce from other sources--to convince all true-hearted, candid and intelligent Southerners, who may chance to read our book, (and we hope their name may be legion) that slavery, and nothing but slavery, has retarded the progress and prosperity of our portion of the Union; depopulated and impoverished our cities by forcing the more industrious and enterprising natives of the soil to emigrate to the free states; brought our domain under a sparse and inert population by preventing foreign immigration; made us tributary to the North, and reduced us to the humiliating condition of mere provincial subjects in fact, though not in name. We believe, moreover, that every patriotic Southerner thus convinced will feel it a duty he owes to himself, to his country, and to his God, to become a thorough, inflexible, practical abolitionist. So mote it be!