Moore died suddenly in New York City in 1899, leaving a large estate. His partner Schley carried on the business after Moore's death. Moore married twice. He had two daughters – Ruth and Faith – with his first wife, Miriam Jane Aldrich (1853-1890), of Munson, Massachusetts, whom he married in 1872. Ruth married
Arthur Lee, a British military officer, later in 1899, just after her father's death. The couple had met in
Kingston, Ontario, where Lee was a
professor at the
Royal Military College of Canada. With her inheritance, Lee was able to retire from the military in his early 30s, and start a very successful political career in Britain, being elected to the House of Commons in 1900. The couple later donated their country estate –
Chequers – in 1917 to the British government for use in perpetuity by successive prime ministers. Lee became
Viscount Lee of Fareham, a member of the
House of Lords, and Ruth became a Viscountess until her death in 1965; the couple had no children. Faith Moore also moved to Britain, dying there in 1944. Moore had a son with his second wife, Louise Taylor Hartshorne (June 6, 1867 – February 10, 1923) of New York City, whom he married in 1894. She was the daughter of James Mott Hartshorne, also a Wall Street financier, who had founded his own firm James M. Hartshorne and Brother in 1863. ==Legacy==