"General Anti-slavery Convention (1st : 1840 : London, England)" . . . . . . . "Slavery and the internal slave trade in the United States of North America; being replies to questions transmitted by the committee of the British and Foreign Anti-Slavery Society, for the abolition of slavery and slave trade throughout the world"@en . . "Slavery and the internal slave trade in the United States"@en . "Slavery and the internal slave trade in the United States" . . . . . . . . . . . . . . . . . . . "General Anti-slavery Convention, 1st., London, 1840." . . .