 Complete the following phrase:  The land on which Clifton Park sits was once farmland. Built around 1803, the home was originally the summer residence of Capt. Henry Thompson, 1774-1837. Born in Sheffield, England, he came to Baltimore around 1794, and soon became a prominent figure in the newly emerging city as a merchant, ficier, and company director. Thompson was public-spirited and used his knowledge of horses in military matters to serve as a cavalry officer in the Maryland State Militias Baltimore Light Dragoons, which he joined in 1809 and was elected captain. He later organized the First Baltimore Horse Artillery in 1813, which defended Baltimore during the British attack during the War of 1812 at the 