Some religious communities and church societies were conservators of abolition ideas. The Quakers deserve, in this work, to be placed before all other denominations because of their general acceptance and advocacy of anti-slavery doctrines when the system of slavery had no other opponents. From the time of George Fox until the last traces of the evil were swept from the English-speaking world many Quakers bore a steadfast testimony against it.[274] Fox reminded slaveholders that if they were in their slaves' places they would consider it "very great bondage and cruelty," and he urged upon the Friends in America to preach the gospel to the enslaved blacks. In 1688 German Friends at Germantown, Pennsylvania, made an official protest "against the traffic in the bodies of men and the treatment of men as cattle." By 1772 New England Friends began to disown (expel) members for failing to manumit their slaves; and four years later both the Philadelphia and the New York yearly meetings made slaveholding a disownable offence. A similar step was taken by the Baltimore Yearly Meeting in 1777; and meetings in Virginia were directed, in 1784, to disown those that refused to emancipate their slaves.[275] Owing to obstacles in the way of setting slaves free in North Carolina, a committee of Quakers of that state was appointed in 1822 to examine the laws of some of the free states respecting the admission of people of color therein. In 1823 the committee reported that there was "nothing in the laws of Ohio, Indiana, and Illinois to prevent the introduction of people of color into those states, and agents were instructed to remove slaves placed in their care as fast as they were willing to go." These facts show the sentiment that prevailed in the Society of Friends. Many Southern Quakers moved to the North on account of their hatred of slavery, and established such important centres of underground work as Springboro and Salem, Ohio, and Spiceland and New Garden, Indiana. Quakers in New Bedford and Lynn, Massachusetts, and Valley Falls, Rhode Island, engaged in the service. The same class of people in Maryland coöperated with members of their society in the vicinity of Philadelphia. The existence of numerous Underground Railroad centres in southeastern Pennsylvania and in eastern Indiana is explained by the fact that a large number of Quakers dwelt in those regions. [274] S. B. Weeks, _Southern Quakers and Slavery_, p. 198. [275] _American Church History_, Vol. XII; see article on "The Society of Friends," by Professor A. C. Thomas, pp. 242-248; also Weeks, _Southern Quakers and Slavery_, pp. 198-219.