Gladstone, J., & Cropper, J. (1824). The correspondence between John Gladstone, Esq., M.P., and James Cropper, Esq. on the present state of slavery in the British West Indies and in the United States of America: And on the importation of sugar from the British settlements in India : with an appendix containing several papers on the subject of slavery. Printed for the West India Association by Thos. Kaye, and Longman, Hurst and Co..

Gladstone, John, agus James Cropper. The Correspondence Between John Gladstone, Esq., M.P., and James Cropper, Esq. on the Present State of Slavery in the British West Indies and in the United States of America: And on the Importation of Sugar from the British Settlements in India : With an Appendix Containing Several Papers on the Subject of Slavery. Liverpool: Printed for the West India Association by Thos. Kaye, and Longman, Hurst and Co., 1824.

Gladstone, John, agus James Cropper. The Correspondence Between John Gladstone, Esq., M.P., and James Cropper, Esq. on the Present State of Slavery in the British West Indies and in the United States of America: And on the Importation of Sugar from the British Settlements in India : With an Appendix Containing Several Papers on the Subject of Slavery. Printed for the West India Association by Thos. Kaye, and Longman, Hurst and Co., 1824.