Caption: Storing slaves on a Trans-Atlantic transport ship with four slave decks.
Source: Thomas Clarkson: The cries of Africa to the inhabitants of Europe, c. 1822. "Boek- en steendrukkerij v. C.A. Spin", Amsterdam - Peace Palace Library, https://commons.wikimedia.org/wiki/File:Thomas-Clarkson-De-kreet-der-Afrikanen_MG_1315.tif