 He was one of forty gentlemen who subscribed $10,000 each, and founded (February 1, 1796) the United insurance company, also acting as a director, and serving as president for many years.His summer residence on the East River, opposite Blackwell's Island, known as" Sunswick," built in 1791, was one of the largest and best appointed private houses near New York.John Delafield had nine sons and four daughters.