Question: When did the Washington & Jefferson College alumni as federal executives of the class of 1851 die ?

text: List of Washington & Jefferson College alumni
Law and government -- Federal executives
James Blaine Benjamin Helm Bristow
Washington & Jefferson College is a private liberal arts college in Washington, Pennsylvania, which is located in the Pittsburgh metropolitan area. The college traces its origin to three log cabin colleges in Washington County, Pennsylvania established by three frontier clergymen in the 1780s: John McMillan, Thaddeus Dod, and Joseph Smith. These early schools eventually grew into two competing colleges, with Jefferson College in Canonsburg, Pennsylvania being chartered in 1802 and Washington College being chartered in 1806. These two schools merged in 1865 to form Washington & Jefferson College. As of 2009, Washington & Jefferson College had about 12,000 living alumni. Before the union of the two colleges, Washington College graduated 872 men and Jefferson College graduated 1,936 men. The alumni association recognizes as alumni all students who have completed at least one college year as full-time students. These alumni include James G. Blaine, who served in Congress as Speaker of the House, U.S. Senator from Maine, two-time United States Secretary of State and the Republican nominee for the 1884 presidential election. Other graduates have held high federal positions, including United States Secretary of the Treasury Benjamin Bristow and United States Attorney General Henry Stanbery, who successfully defended Andrew Johnson during his impeachment trial. As a U.S. Congressman, Clarence Long was a key figure in directing funds to Operation Cyclone, the CIA's effort to arm the mujahideen in the Soviet-Afghan War.
Alumni Class year Notability
William Livingston Alden Jefferson 1858 United States General Consul to Rome ( 1885-1907 ) ; author and editor of The New York Times ; credited with bringing the sport of canoeing to the United States ; son of Joseph Alden , President of Jefferson College
James G. Blaine Washington 1847 Republican nominee for President of the United States in 1884 , losing to Grover Cleveland by 1,047 votes ; leader of the Half-Breed faction of the postbellum Republican party ; United States Secretary of State ( 1881 , 1889-1892 ) ; U.S . Senator from Maine ( 1876-1881 ) ; Speaker of the United States House of Representatives ( 1869-1873 , 1873-1875 ) ; U.S . Congressman from Maine ( 1863-1876 )
Benjamin Bristow Jefferson 1851 Solicitor General of the United States ( 1870-1872 ) ; United States Secretary of the Treasury ( 1874-1876 )
Maxwell M. Hamilton 1918 United States Ambassador to Finland ( 1945-1947 ) ; diplomatic representative to Finland during 1944 amid World War II and the Continuation War
George A. Jenks Jefferson 1858 United States Solicitor General ( 1886-1889 ) ; U.S . Congressman from Pennsylvania ( 1875-1877 ) , where he was a House Manager for the impeachment proceedings of United States Secretary of War William Belknap
Noah C. McFarland Washington 1844† Commissioner of the General Land Office ( 1881-1885 ) ; Ohio State Senator ( 1866-1867 ) ; Kansas State Senator
Thomas M. T. McKennan Washington 1810 United States Secretary of the Interior ( 1850 ) ; U.S . Congressman from Pennsylvania ( 1831-1839 , 1842-1843 )
Henry Stanbery Washington 1819 United States Attorney General ( 1866-1868 ) , resigning to defend Andrew Johnson during his impeachment ; Attorney General of Ohio ( 1846-1851 )