1791 – John Nelson, born on the 1st of June in Frederick, Maryland, the son of politician Roger Nelson.
1811 – He graduated from the College of William and Mary.
1813 – He was admitted to the bar, starting practice in Frederick.
1821 – 1823 – He served only one term representing Maryland districts.
1825 – He received an A.M. degree from Princeton University.
1831 – 1832 – He was appointed Chargé d’affaires to the Two Sicilies.
1843 – 1845 – He was Attorney General of the United States under John Tyler.
1844 – He also served as United States Secretary of State ad interim for about a month after the sudden death of the previous Secretary of State Abel P. Upshur.
1860 – He retired from public life and died in Baltimore, Maryland, on the 8th of January.