Thomas Clarkson 
The History of The Rise, Progress and Accomplishment Of The Abolition Of The African Slave Trade By The British Parliament (1808), Volume I 

"The History of the Rise, Progress and Accomplishment of the Abolition of the African Slave Trade by the British Parliament (1808), Volume I" by Thomas Clarkson is a seminal historical work that provides a detailed account of the efforts to abolish the African slave trade by the British Parliament. Clarkson, a prominent abolitionist, meticulously documents the rise of the abolitionist movement, the progress made in raising awareness about the horrors of the slave trade, and the ultimate accomplishment of the passage of the Abolition Act of 1807. This comprehensive and passionate narrative remains a vital resource for understanding the struggle to end one of humanity's darkest practices.