to discuss the commercial relations of the two states, finishing their business at Mount Vernon. The Mount Vernon Conference concluded on March 28 with an agreement for freedom of trade and freedom of navigation of the Potomac River. The Maryland legislature, in ratifying this agreement on November 22, proposed a conference among representatives from all the states to consider the adoption of definite commercial regulations. This led to the calling of the Annapolis Convention of 1786, which in turn led to the calling of the Federal Convention of 1787. District of Columbia In 1791, Alexandria was included in the area chosen by George Washington to become the District of Columbia. A portion of the City of Alexandria—known as "Old Town"--- and all of today's Arlington County share the distinction of having been originally in Virginia, ceded to the U.S. Government to form the District of Columbia, and later retroceded to Virginia by the federal government in 1846, when the District was reduced in size to exclude the portion south of the Potomac River. The City of Alexandria was re-chartered in 1852. In 1814, during the War of 1812, a British fleet launched a successful Raid on Alexandria, which surrendered without a fight. As agreed in the terms of surrender the British looted stores and warehouses of mainly flour, tobacco, cotton, wine, and sugar. From 1828 to 1836, Alexandria was home to the Franklin & Armfield Slave Market, one of the largest slave trading companies in the country. By the 1830s, they were sending more than 1,000 slaves annually from Alexandria to their Natchez, Mississippi, and New Orleans markets to help meet the demand for slaves in Mississippi and surrounding states. Later owned by Price, Birch & Co., the slave pen became a jail under Union occupation. Return to Virginia Over time, a movement grew to separate Alexandria from the District of Columbia. As competition grew with the port of Georgetown and the Chesapeake and Ohio Canal fostered development on the north side of the Potomac River, the city's economy stagnated. In addition, many in Alexandria hoped to benefit from land sales and increased business from the federal government, which had no need for the land south of the river at the time. Also, its residents had lost representation and the right to vote at any level of government. Alexandria was also an important port and market in the slave trade,