Robert Lenox Belknap (1848-1896) was a capitalist and financier of New York City. The Robert Lenox Belknap papers are a fragment saved by his descendants. The papers include Belknap's private letterbooks for the final years of his career (1892-1895), although 33 earlier volumes have been lost. They include both business and personal correspondence and give a good picture of the life of a New York financier of the second rank.