The first person of this description in the Society, was William Burling of Long Island. He had conceived an abhorrence of slavery from early youth. In process of time he began to bear his testimony against it, by representing the unlawfulness of it to those of his own Society, when assembled at one of their yearly meetings. This expression of his public testimony he continued annually on the same occasion. He wrote also several tracts with the same design, one of which, published in the year 1718, he addressed to the elders of his own church, on the inconsistency of compelling people and their posterity to serve them continually and arbitrarily, and without any proper recompense for their services. The next was Ralph Sandiford, a merchant in Philadelphia. This worthy person had many offers of pecuniary assistance, which would have advanced him in life, but he declined them all because they came from persons, who had acquired their independence by the oppression of their slaves. He was very earnest in endeavouring to prevail upon his friends, both in and out of the Society, to liberate those whom they held in bondage. At length he determined upon a work called The Mystery of Iniquity, in a brief Examination of the Practice of the Times. This he published in the year 1729, though the chief judge had threatened him if he should give it to the world, and he circulated it free of expense wherever he believed it would be useful. The above work was excellent as a composition. The language of it was correct. The style manly and energetic. And it abounded with facts, sentiments, and quotations, which, while they showed the virtue and talents of the author, rendered it a valuable appeal in behalf of the African cause.