Outerbridge Horsey III (March 5, 1777 – June 9, 1842) was an American lawyer and politician from Wilmington, Delaware. He was a member of the Federalist Party, who served in the Delaware General Assembly, as Attorney General of Delaware (1806–1810) and as United States Senator from Delaware (1810–1821). Early life and family Horsey was born in Little Creek Hundred, near Laurel, Delaware. First living in Georgetown, Delaware, he moved to Wilmington, and studied the law there under James A. Bayard, who remained his lifelong political mentor. A frequent supporter of education, Horsey, early in his career, urged the establishment of a library in Georgetown, and later was appointed a trustee of the College of Wilmington. He was admitted to the Delaware Bar in December 1807, and began a practice in Wilmington. He married Elizabeth Digges Lee, daughter of Thomas Sim Lee (1745-1819) of Maryland. He owned more than 36 slaves during his life, and freed some of them as he grew older. Professional and political career While practicing the law and after representing Sussex County in the State House from the 1801 session through the 1803 session, Horsey was appointed to be the Delaware Attorney General and served from 1806 to 1810. In 1810 he was elected to the U.S. Senate to fill the vacancy caused by the death of U.S. Senator Samuel White. In the Senate he initially opposed the War of 1812 strongly, but once it had been declared, he supported it with equal vigor. He accordingly became a member of the Committee of Safety and was actively involved in preparing the defenses of Fort Union and Wilmington. In March 1814 Horsey presented a petition from the citizens of Delaware to repeal the Embargo Act of 1807; although he was able to get a committee appointed to consider the question, the effort was ultimately unsuccessful. He was reelected in 1814, and served from January 12, 1810, to March 3, 1821. Following the War of 1812, but while still a contentious subject, the need for internal improvements had become much more apparent and recognized. It would be on Horsey's motion in January 1816, that the Senate finally passed the resolution to print and distribute copies of Treasury Secretary Albert Gallatin's 1808 Report on the Subject of Public Roads and Canals. The report, which had been requested by the Senate in 1807 and transmitted to it in 1808 had fallen