The argument, that the colonial slaves are better off than the British peasantry answered from the Royal Jamaica Gazette of June 21, 1823 - Clarkson, Thomas 1760-1846 (Printed for the Whitby Anti-Slavery Society, by R. Kirby, 1824)
Goldsmiths'-Kress no. 24299. - OCLC, 17525237. - Reproduction of original from Goldsmiths' Library, University of London