Astor Library him as president. After two years, in 1891, Thomas M. Markoe was chosen to the office, which he held until the 1895 consolidation. John Jacob Astor III, son of William B. and grandson of John Jacob Astor, died in 1890, having served as trustee since 1858 and as treasurer since 1868. By his will, $400,000 was left to the library. As William Waldorf Astor declined to fill the vacancy, the board ceased to have an Astor on it. At the time of consolidation the trustees, in order of seniority, were Markoe, Henry Drisler, John Lambert Cadwalader, Henry C. Potter, Stephen
John Jacob Astor III and Sarah Cox Todd (1761–1842). His maternal grandparents were Senator John Armstrong, Jr. (1758–1843) and Alida Livingston (1761–1822) of the Livingston family. He was also a nephew of occasional poet John Jacob Astor, Jr. (1791–1869). John Astor studied at Columbia University and the University of Göttingen, following which he went to Harvard Law School. He practiced law for a year, to qualify for assisting in the management of his family's immense estate, one half of which later descended to him. It was based on his paternal grandfather's achieving a monopoly in the lucrative fur trade in the early nineteenth century.