1816-1817, Ebenezer Denny 1817-1825, John Darragh 1825-1828, John M. Snowden 1828-1830, Magnus M. Murray 1830-1831, Matthew B. Lowrie 1831-1832, Magnus M. Murray 1832-1836, Samuel Pettigrew 1836-1839, Jonas R. McClintock 1839-1840, William Little 1840-1841, William W. Irwin 1841-1842, James Thomson 1842-1845, Alexander Hay 1845-1846, William J. Howard 1846-1847, William Kerr 1847-1849, Gabriel Adams 1849-1850, John Herron 1850-1851, Joseph Barker 1851-1853, John B. Guthrie 1853-1854, Robert M. Riddle 1854-1856, Ferdinand E. Volz 1856-1857, William Bingham 1857-1860, Henry A. Weaver 1860-1862, George Wilson 1862-1864, B. C. Sawyer 1864-1866, James Lowry 1866-1868, W. S. McCarthy 1868-1869, James Blackmore 1869-1872, Jared M. Brush 1872-1875, James Blackmore 1875-1878, William C. McCarthy 1878-1881, Robert Liddell 1881-1884, Robert W. Lyon 1884-1887, Andrew Fulton 1887-1890, William McCallin 1890-1893, Henry I. Gourley 1893-1896, Bernard McKenna 1896-1899, Henry P. Ford 1899-1901, William J. Diehl 1901, A. M. Brown (Title changed to Recorder) 1901-1903, J. O. Brown (Recorder) 1903, W. B. Hays (Recorder; served about one week under that title) 1903-1906, W. B. Hays (Mayor again) 1906-1909, George W. Guthrie A movement to consolidate the cities of Pittsburgh and Allegheny together with some adjacent boroughs, was begun in 1853-54. It failed entirely that year, but in 1867 Lawrenceville, Peebles, Collins, Liberty, Pitt, and Oakland, all lying between the two rivers, were annexed to Pittsburgh, and in 1872 there was a further annexation of a district embracing twenty-seven square miles south of the Monongahela River, while in 1906 Allegheny was also annexed; and, as there was litigation to test the validity of the consolidation, the Supreme Court of the United States on December 6, 1907, declared in favor of the constitutionality of the act. XIV The first national convention of the Republican party was held in Pittsburgh on February 22 and 23, 1856. While this gathering was an informal convention, it was made for the purpose of effecting a national organization of the groups of Republicans which had grown up in the States where slavery was prohibited. Pittsburgh was, therefore, in a broad sense, the place where the birth of the Republican party occurred. A digression on this subject, in order that the record may be made clear, will probably not be unwelcome.