"Slavery United States Controversial literature." . . "Slavery United States Legal status of slaves in free states." . . "United States" . . "Fugitive slaves United States." . . . . . . . . . . . . . . . . . . "John Van Zandt, ad sectum Wharton Jones"@en . . . "In the Supreme Court of the United States. John Van Zandt, ad sectum Wharton Jones. Argument for the defendant"@en . "Argument for the defendant by William H. Seward, on the law of Congress concerning the recapture of fugitive slaves" . "Argument for the defendant by William H. Seward, on the law of Congress concerning the recapture of fugitive slaves"@en . . . "In the Supreme Court of the United States John Van Zandt, ad sectum Wharton Jones : argument for the defendant"@en . . "In the Supreme Court of the United States : John Van Zandt, ad sectum Wharton Jones : argument for the defendant" . . . . "Controversial literature"@en . . . . . . . "Electronic books"@en . . . . "In the Supreme Court of the United States, John Van Zandt, ad sectum Wharton Jones argument for the defendant"@en . . . . . . . . "Fugitive slave law of 1793." . . . .