http://www.bbc.co.uk/history/british/empire_seapower/barbados_01.shtml
https://www.nationalarchives.gov.uk/pathways/blackhistory/africa_caribbean/africa_trade.htm
https://www.nytimes.com/2010/04/23/opinion/23gates.html
https://theculturetrip.com/africa/ghana/articles/ghana-s-slave-castles-the-shocking-story-of-the-ghanaian-cape-coast/
https://en.wikipedia.org/wiki/Age_of_Discovery
https://en.wikipedia.org/wiki/History_of_slavery
https://en.wikipedia.org/wiki/Slavery_in_Africa
https://slavevoyages.org/voyage/9714/variables
https://en.wikipedia.org/wiki/Slavery_in_Britain
https://en.wikipedia.org/wiki/Hannibal_(slave_ship)
https://en.wikipedia.org/wiki/Atlantic_slave_trade
https://books.google.co.th/books?id=jvsVSqhw-FAC&pg=PA505&lpg=PA505&dq=slave+cost+hannibal&source=bl&ots=pXMP_vhhcG&sig=ACfU3U0hEQnt_m_3_iGgDfy_DtidMg64yg&hl=en&sa=X&ved=2ahUKEwiu_4_dr4DoAhUN8XMBHXqOAqcQ6AEwDHoECAkQAQ#v=onepage&q=slave%20cost%20hannibal&f=false
https://erenow.net/modern/atlanticslavetrade1440-1870/43.php
http://www.ettc.net/tah/Reading%20Assignments/Phillips,%20A%20Journal%20of%20a%20Voyage%20made%20in%20the%20Hannibal,%201693.pdf
https://www.brh.org.uk/site/articles/should-society-memorialise-a-slave-trader/
https://s3-us-west-2.amazonaws.com/acheivingthedream/FSCJ/AMH2092/Module_02_Thomas+Phillips_excerpt.pdf
https://www.liverpoolmuseums.org.uk/history-of-slavery
https://brycchancarey.com/equiano/extract2.htm
http://discoveringbristol.org.uk/slavery/routes/from-africa-to-america/atlantic-crossing/middle-passage/