b. February 24, 1800, in Franklin County, Kentucky; d. July 17, 1880, in Springfield, Illinois. In 1817, Logan studied law with his uncle Judge Tomkins and was admitted to the bar in Kentucky at the age of twenty. He was appointed Commonwealth Attorney for the Glasgow district of Kentucky. Logan came to Springfield, Illinois, in 1832 to continue the practice of law and formed a partnership with William L. May. In January of 1835, Logan became judge of the First Judicial Circuit and held that position until March of 1837. After resigning from the bench, Logan formed a legal partnership with Edward D. Baker, but that partnership soon ended because Logan found Baker to be reckless with money. In 1841, Abraham Lincoln became Logan’s junior law partner. This partnership lasted until 1844, when they amicably dissolved the relationship so that Logan could practice law with his son, David Logan. Active in Whig politics, Logan was elected to the Illinois legislature in 1842, 1844, and 1846. Logan served in the Illinois constitutional convention of 1848, and he was elected again to the state legislature in 1854. He was also a delegate to the Republican national nominating convention in 1860. President Lincoln appointed Logan in 1862 to a commission to investigate claims against the government in Cairo, Illinois. That same year, Logan served as a delegate to the Washington Peace Conference.