Josiah Wedgwood (1730-1795) and either William Hackwood or Henry Webber; "Josiah Wedgewood...produced the emblem as a jasper-ware cameo at his pottery factory. Although the artist who designed and engraved the seal is unknown, the design for the cameo is attributed to William Hackwood or to Henry Webber, who were both modelers at the Wedgewood factory." (https://www.pbs.org/wgbh/aia/part2/2h67.html PBS]) · Public domain · via Wikimedia Commons
slavery
system under which people are treated as property to be bought and sold, and are forced to work