STUART, Robert Leighton, merchant, born in New York city, 21 July, 1806; died there, 12 December, 1882. His father, Kimloeh, was a successful candy-manufacturer, who came from Edinburgh, Scotland, in 1805, and died in 1826. The son succeeded to the management of the business, and in 1828 formed a partnership with his brother, Alexander. They began refining sugar by steam in 1832, and were the first to succeed in this process. They abandoned candy-making in 1856, devoting themselves solely to sugar-refining, and in 1872 they retired from active business. He was president of the American museum of natural history and of the Presbyterian hospital, New York, was connected with various charitable, scientific, and social organizations, and was known also as the possessor of a large and valuable library and gallery of paintings and a munificent giver to educational and religious institutions. In 1880 he gave $55,000 to the Presbyterian hospital, New York city, $100,000 to Princeton theological seminary, $100,000 to Princeton college, and $50, -000 to the San Francisco theological seminary. Mr. Stuart's charities are continued by his widow, whose New York residence is among the finest in the country.--His brother, Alexander, born in New York city, 22 December, 1810; died there, 23 December, 1879, was a generous donor to philanthropic objects. The brothers began in 1852 to devote each year a certain minimum sum to works of benevolence, chiefly connected with the Presbyterian church, and before the death of Alexander had given away $1,391,000, which was increased by the subsequent gifts of Robert L. to nearly $2,000,000.