Excerpt: "When I began the study of the Domestic Slave Trade of the Southern States I had no idea of the conclusions as herein found. Especially is this true of Chapters III. and IV. I have spared no pains to be accurate in all statements of fact.The material for this work was collected in the Yale University Library in New Haven, Connecticut, and in the Congressional Library at Washington. The sources used are to be found in the appended bibliography. The most helpful were books of travel, newspapers and periodicals, Statistics of Southern States and the United States Census Reports."