Henry Carnegie Phipps (1879 - 1953) was a capitalist and real estate developer who built apartment buidings in Sutton Place, Manhattan. He married (1907) Gladys Mills Phipps (1883 - 1970), who was an socialist, sportspwoman, thoroughbred racehorse owner and breeder who began the Phipps family dynasty in American horse racing. Born in New York, Grace was the daughter of Ruth Livingston and Darius Ogden Mills (and the sister of Ogden Livingson Mills who served as the U.S. Secretary of the Treasury). Although an avid golfer and ice skater, she was first and foremost a lover of horses who brought the family into the sport of Thoroughbred racing in 1926 when she and her brother Ogden L, Mills established the highly successful Wheatley Stable. Their Long Island estate designed by John Russell Pope for William L. Stow, then owned by George Crocker, and remodeled for the Phippses in 1918 by Horace Trumbauer was named "Spring Hill."