Slavery

The Adventures of Ibn Battuta by Ross E Dunn (1986) 

Mansa Musa

West Africa in the 14th century may have produced 2/3 of the world's gold 

Mali slave trade and slave used in salt mines

Battuta spends several days at Taghaza the main salt mining center of the Western Sahara observing slave digging slabs out of the open mine and tie them to camels.

Battuta refers to himself as a "white man" and the Malians as "black men".

At Mali's capital Battuta writes of how offensive he found woman slaves at the sultan's court, not because they were slaves, but because they were naked. 

On his travels he reports receiving a slave boy as a gift who accompanies him back north.

At Takedda, a copper mining town in the Sahara he writes "Its people are comfortable and well off and proud of the number of male and female slaves which they have."  He purchaed a slave girl there.

Leaves Takedda on Sept 11, 1353 with caravan transporting 600 black female slaves to Morocco to be sold as domestics, concubines, or servants of the royal court.