Other railroads came as they were needed. The Baltimore and Ohio received a charter from the State of Maryland on February 28, 1827, but did not reach Pittsburgh until December 12, 1860, when its Pittsburgh and Connellsville branch was opened. The Ohio and Pennsylvania Railroad was built into Pittsburgh July 4, 1851, and became part of the Pittsburgh, Fort Wayne and Chicago Railway in 1856, that line reaching Chicago in 1859. The Pittsburgh, Cincinnati, Chicago and St. Louis Railway (the "Pan Handle") was opened between Pittsburgh and Columbus, Ohio, October 9, 1865. The Pittsburgh and Lake Erie Railroad, now a part of the New York Central Lines, was opened into Pittsburgh in February, 1879. The Wabash Railway completed its entrance into the city on June 19, 1904. XIII [Illustration: View of Old Pittsburgh, 1817] In 1784 the town was laid out and settlers, among whom were many Scotch and Irish, came rapidly. The town was made the county seat in 1791, incorporated as a borough in 1794, the charter was revived in 1804, and the borough was chartered as a city in 1816. The first charter granted to Pittsburgh in 1816 vested the more important powers of the city government in a common council of fifteen members and a select council of nine members. In 1887 a new charter was adopted giving to the mayor the power to appoint the heads of departments who were formerly elected by the councils. On March 7, 1901, a new charter, known as "The Ripper," was adopted, under the operations of which the elected mayor (William J. Diehl) was removed from his office, and a new chief executive officer (A. M. Brown) appointed in his place by the governor, under the title of recorder. By an act of April 23, 1903, the title of mayor was restored, and under the changes then made the appointing power rests with the mayor, with the consent of the select council. The following is a list of the mayors of Pittsburgh: