“Campbell, Thompson,” Biographical Directory of the United States Congress, 1774 to Present, http://bioguide.congress.gov/scripts/biodisplay.pl?index=C000102.
CAMPBELL, Thompson, a Representative from Illinois; born in Ireland in 1811; immigrated to the United States with his parents, who settled in Chester County, Pa.; attended the public schools; studied law; was admitted to the bar in Pittsburgh, Pa.; moved to Galena, Ill., and engaged in mining; secretary of state of Illinois from 1843 until he resigned in 1846; delegate to the State constitutional convention in 1847; elected as a Democrat to the Thirty-second Congress (March 4, 1851-March 3, 1853); unsuccessful candidate for reelection in 1852 to the Thirty-third Congress; dele