Complex sentence: He was also co-founder and director of the New York Vigilance Committee and a member of the American Anti-Slavery Society, assisting runaway slaves and the Society for the Promotion of Education Among Colored Children.
Split into simpler sentences: He was also co-founder and director of the New York Vigilance Committee and a member of the American Anti-Slavery Society, assisting runaway slaves. Ray was also active in the Society of the Promotion of Education Among Colored Children.