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Rh place, their mental condition, lie imposed on himself, in addition to the laborious duties of his own school, the task of giving in the evenings gratuitous instruction to the negroes of Philadelphia; and he had the great satisfaction to discover, by the improvement of his pupils in literature, as well as their moral advancement, that the hitherto long asserted idea of their mental inferiority to the rest of mankind was fallacious and illusory. Having excited in the minds of his fellow-citizens an increased interest and sympathy for this oppressed people, he proceeded to make more public the results of his reflections and experience. His first writings consisted of small pieces in the almanacs and newspapers of the day, which medium he selected as best adapted to engage all classes of people in favor of his benevolent designs. In 1762 he published "An account of that part of Africa inhabited by the Negroes." In 1767, "A Caution and Warning to Great Britain and her colonies on the calamitous state of the enslaved Negroes." This work was examined and approved by the Society of Friends in Pennsylvania, as appears by the minutes of meetings of the representatives of that body, held in 1766, at whose expense a large number of copies were printed and sent to England for distribution. 3d. "An Historical Account of Guinea, its situation, produce, and the general disposition of its inhabitants; with an inquiry into the rise

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