...This species of servitude may be termed serfdom, as it has to be rendered in consequence of subjection by force of arms, but it is necessarily very mild... 
David Livingstone 「Missionary Travels and Researches in South Africa」
..."The loser," says he, "goes into a voluntary servitude, and though younger and stronger than the person with whom he played, patiently suffers himself to be bound and sold...
Thomas Clarkson 「An Essay on the Slavery and Commerce of the Human Species, Particularly the African」
... The law, by which prisoners of war were said to be sentenced to servitude, was the law of nations...
Thomas Clarkson 「An Essay on the Slavery and Commerce of the Human Species, Particularly the African」
..." The old man remained only to feel more keenly than ever, the pang of having sons still toiling in hopeless servitude...
William Still 「The Underground Railroad」
...A secret passage was secured for him on one of the Richmond steamers, and thus he escaped from his servitude...
William Still 「The Underground Railroad」
...Ely, in Norfolk, the place of her abode, and the field of his servitude...
William Still 「The Underground Railroad」
... He was raised with her sister, who resided in Norfolk, the place of James' servitude...
William Still 「The Underground Railroad」
...Her servitude, until within four years of her escape, had been passed in Virginia, under Mrs...
William Still 「The Underground Railroad」
...They were yet slaves,crushed by a cruel servitude, without education or religious instruction...
W.E.B. Du Bois 「The Negro」
...I saw that I needed education, and it was one of the bitterest remembrances of my servitude that I had been cheated out of this inalienable right—this immeasurable blessing...
Louis Hughes 「Thirty Years a Slave」
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