…cords Service. Teacher’s Manual Section 1: Lesson 1 Brooklyn was the slaveholding capital of New York State. In 1790, the first official federal census revealed that the population of Kings County had doubled in less than a century. 4,495 residents, mostly of Dutch, English, and African descent, lived and worked on the county’s large farms. Not all were free. In 1738, 25% of Kings County’s residents were held in slavery. In 1790, this number had…