Francis Preston Blair, Jr.
Francis Preston Blair Jr. was an American jurist, politician and soldier. He represented Missouri in both the House of Representatives and the Senate, and was active in preventing the state of Missouri from being absorbed into the Confederacy at the beginning of the Civil War. Blair was instrumental in appointing Nathaniel Lyon as the new military commander of the Western Department of the U.S. Army. He assisted Lyon in securing help of the St. Louis Home Guard in moving over 20,000 rifles and muskets from the St. Louis Arsenal to Illinois. Missouri secessionists considered this event as breaking of informal truce established in the state. This set the scene for the Camp Jackson Affair and continuing guerrilla activity by outraged proslavery elements.
Blair was born in Lexington, Kentucky. He was the third and youngest son of newspaper editor and politician Francis Preston Blair, and Eliza Violet Blair. He was the brother of Montgomery Blair, a Mayor of St. Louis and Postmaster General under Lincoln, and the cousin of B. Gratz Brown, a U.S. Senator and Governor of Missouri. Blair attended schools in Washington, D.C., was matriculated in Yale and the University of North Carolina, but graduated from Princeton University in 1841, and then studied law at Transylvania University. After his admission to the Kentucky bar in Lexington, he went on to practice in St. Louis in 1842 with his elder brother in 18421845, he worked in the law office of Thomas Hart Benton.
Source: Wikipedia