one that brought Southern cotton to New York for export to textile mills in the Northeast and in Europe, and carried manufactured products to the South. By 1830, 40 cents of every dollar the mills paid for cotton went to New York brokers to cover the cost of shipping. The main rivals, Boston Philadelphia and Baltimore, tried to compete with the Erie Canal by opening their own networks of canals and railroads; they never caught up. Manufacturing was not a major factor in the city's growth in the 19th century—factories were chiefly being built in towns and smaller cities with waterfalls and fast rivers that were harnessed to generate the power, or were closer to coal supplies. In 1792, a group of merchants made the "Buttonwood Agreement" and began meeting under a buttonwood tree on Wall Street, beginning the New York Stock Exchange, while a yellow fever epidemic that summer sent New Yorkers fleeing north to nearby healthful Greenwich Village. In 1797, Aaron Burr took control of Tammany Hall and used it to win the state's electoral vote in the 1800 presidential election. In 1807, Robert Fulton initiated a steamboat line from New York City to Albany, which accelerated the movement of cargo and passengers upriver. Lumber and coal were the main products brought into New York. The establishment of regular steam ferries spurred the growth of Brooklyn, which was established as a city in 1834. On September 3, 1821, the Norfolk and Long Island Hurricane caused a storm surge of 13 ft in one hour, leading to widespread flooding south of Canal Street, but few deaths were reported. The hurricane is estimated to have been a Category 3 event and to have made landfall at Jamaica Bay, making it the only hurricane in recorded history to directly strike New York City. In 1824, a riot occurred in Greenwich Village between Irish Protestants and Catholics, after a parade by members of the Orange Order. This was a precursor of the Orange Riots of the 1870s. Immigrants provided a ready resource for those opposing abolition of slavery. These were often led by gangsters from the Bowery and Five Points. On July 7, 1834, a series of riots started, terminating in the destruction of St. Phillip's Negro Church on Center Street and generally terrorizing the Five Points area. In 1831, as the city continued to expand, the University of the City of