"Walker, Robert John," Biographical Directory of the United States Congress, 1774 to Present, http://bioguide.congress.gov/scripts/biodisplay.pl?index=W000067.
WALKER, Robert John, a Senator from Mississippi; born in Northumberland, Pa., July 19, 1801; graduated from the University of Pennsylvania at Philadelphia in 1819; studied law; admitted to the bar in 1821 and commenced practice in Pittsburgh, Pa., the following year; moved to Natchez, Miss., in 1826 and continued the practice of law; elected as a Democrat to the United States Senate; reelected, and served from March 4, 1835, to March 5, 1845, when he resigned; chairman, Committee on Public Lands (Twenty-fourth through Twenty-sixth Congresses); Secretary of the Treasury in