vineyards in the United States. A postal office served the manor from 18 September 1876 to 31 August 1907. The manor became the site for the yearly Howard County Horse Show through the 1930s, attracting thousands. The "Manor Dairy" opened in 1962 providing milk and dairy products. The Carroll family were enthusiastic horse breeders and raced thoroughbreds, competing with other well-to-do families at annual racing events, which also formed an important part of the social and political life of the colony. Charles Carroll of Annapolis's horse was beaten in 1743 by George Hume Steuart's "Dungannon" in the Annapolis Subscription Plate, established that year. In 1830, Emily Caton MacTavish donated 253 acres to build St. Charles College, Maryland, After a fire in 1911, Carroll family heirs sued to sell the property and divide the proceeds among the family. During the Civil war, the manor served as a hub for munitions for Southern supporters, also using nearby Mt. Pleasant as a substation. By 1931, the manor estate consisted of the mansion, overseer's house, horse stable, bank barn, 3 silos, corn house, 11 tenant houses, wash house, sheep house, coach house, brick barn and two barracks. Members of the Carroll family still own and live in the manor, which sits at the center of an of the original estate. Land was divided among the heirs each generation, sold for subdivisions, with at least owned by the family as late as 1971 and by 1977. According to a newspaper article: "As one family member put it a few years ago, 'Only God, the Indians and the Carrolls have owned this land.'" The estate and Manor Lane are closed to the public. Tax credits and development plans In 1971, the owner, Phillip Carroll, did not want to commit all 2,042 acres to landmark status, preferring to leave part of it for future development, so about 900 acres were designated landmark status, according to the National Register of Historic Places inventory sheet. However, with the 1976 Tax Reform Act, the owner changed his mind and requested the landmark status encompass all the acreage, which was granted. The 30-year tax credit and Maryland Historical Trust's easement expired in 2007. In an attempt to keep the majority of the property in the hands of the Carroll family, they struck a deal in 2008 with Erickson Retirement Communities to sell 150 acres, but the deal fell through the following