On the 20th of January 1526, the Santiago left Lisbon bound for Africa with a cargo of brass and tin bracelets, round bells, barber basins and cloth; by early October the ship was back in Portugal with a very different cargo, 108 enslaved Africans. With chilling detachment the ship's trading log records the commodification of human beings, the prices paid for them, the sums received for their sale and the number who did not survive the crossing. Whilst this log may be extremely rare, it is clear from another surviving document, the receipt book of the customs office of the Portuguese Cape...