but the northern triangle is officially Duffy Square. It was dedicated in 1937 to World War I chaplain Father Francis P. Duffy of the 69th New York Infantry Regiment, and is the site of a memorial to him. There is also a statue of composer and entertainer George M. Cohan, and the TKTS discount ticket booth for Broadway and off-Broadway theaters. History Early history When Manhattan Island was first settled by the Dutch colonists, three small streams united near what is now the intersection of 10th Avenue and 40th Street. These three streams formed the "Great Kill" (Dutch: Grote Kil). From there the Great Kill wound through the low-lying Reed Valley, known for fish and waterfowl, and emptied into a deep bay in the Hudson River at the present 42nd Street. The name was retained in a tiny hamlet, Great Kill, that became a center for carriage-making, as the upland to the south and east became known as Longacre. Before and after the American Revolution, the area belonged to John Morin Scott, a general of the New York militia, in which he served under George Washington. Scott's manor house was at what is currently 43rd Street, surrounded by countryside used for farming and breeding horses. In the first half of the 19th century, it became one of the prized possessions of John Jacob Astor, who made a second fortune selling off lots to hotels and other real estate concerns as the city rapidly spread uptown. By 1872, the area had become the center of New York's horse carriage industry. The locality had not previously been given a name, and city authorities called it Longacre Square after Long Acre in London, where the horse and carriage trade was centered in that city. William Henry Vanderbilt owned and ran the American Horse Exchange there. In 1910, it became the Winter Garden Theatre. As more profitable commerce and industrialization of Lower Manhattan pushed homes, theaters, and prostitution northward from the Tenderloin District, Longacre Square became nicknamed the Thieves Lair for its rollicking reputation as a low entertainment district. The first theater on the square, the Olympia, was built by cigar manufacturer and impresario Oscar Hammerstein I. According to Gotham: A History of New York City to 1898, "By the early 1890s this once sparsely settled stretch of Broadway was ablaze with electric light and thronged by crowds of middle- and upper-class theatre, restaurant