72.13~18吨的黄金:这些估算是基于曼萨·穆萨随身携带80~100车黄金旅行的说法,每车黄金约合152.4千克。他的500名奴隶携带的黄金重达0.9吨。Michael Gomez, African Dominion: A New History of Empire in Early and Medieval West Africa (2018): 106.
74.热带:Peter Russell, Prince Henry the Navigator (2001):109—134页提到了博哈多尔角的航行,256页提到了1444年的俘虏游行,258页提到了1460年前的非洲奴隶人数。
74.埃尔米纳:Ivor Wilks, Forests of Gold: Essays on the Akan and the Kingdom of Assante (1993); Peter L. Bernstein, The Power of Gold: The History of an Obsession (2012): 118.