Britain outlawed slave trading in 1807, and ownership of slaves was banned in 1833.

BBC: Richard Drax, MP for South Dorset

Archaeologists established that this was the site of the 19th century slave trading complex, the Cais do Valongo, or Valongo Quays.

CNN: From Samba to carnival: Brazil's thriving African culture

Crusoe is on a slave-trading mission when his trip goes awry, and he seems to be Friday's master, not his equal.

WSJ: Fiction as Authentic as Fact | Robinson Crusoe | Daniel Defoe | Masterpiece by Danny Heitman

But in present-day Ghana, then called the Gold Coast, there were over 30 more slave forts, built and maintained by almost all of the European trading powers of the day: the Swedes, Danes, French, British, Dutch and Portuguese.

ECONOMIST: Slavery