Men, women and child slaves near Tete, Mozambique, are forced to walk through the fields fettered at the neck and wrists. Wood engraving by J.W. Whymper after J.B. Zwecker.

Licence: Public Domain Mark

Credit: Men, women and child slaves near Tete, Mozambique, are forced to walk through the fields fettered at the neck and wrists. Wood engraving by J.W. Whymper after J.B. Zwecker. Wellcome Collection. Source: Wellcome Collection.