Road. In 1862, during the American Civil War, Selden, a Confederate sympathizer, was forced to sell his land at a low price and move back to his native Virginia. The purchaser was New England native Samuel P. Brown. Brown built a house and allowed the Mount Pleasant General Hospital to be constructed on his land. In June 1863, Walt Whitman saw "a train of about thirty huge four-horse wagons, used as ambulances, filled with wounded, passing up Fourteenth street" traveling from the Siege of Petersburg to the 1,600-bed hospital. After the American Civil War, Brown began selling his land in parcels. He named the area Mount Pleasant Village because it contained the land having the highest elevation within the original Pleasant Plains estate. Brown sold all of his land except for the parcel he retained around his house at 3351 Mount Pleasant Street, NW. His house was demolished in the 1890s. Although Mount Pleasant was within the District of Columbia, it was separated from the city of Washington by vacant land and was rural by comparison. In the 1870s, a horse-drawn streetcar began traveling between the Fourteenth and Park intersection to downtown Washington city, making this the first streetcar suburb in the District of Columbia. In 1878, Mount Pleasant merged into Washington when the city's boundaries became coterminous with those of the District. In 1901, 16th Street NW was extended north of Florida Avenue, establishing the boundary of the neighborhood. Mount Pleasant developed rapidly as a streetcar suburb after the expansion of the mechanized Washington streetcars along 16 1/2 Street (now Mount Pleasant Street) in 1903. In 1907, developer Fulton R. Gordon purchased large sections of the neighborhood, marketing lots as "Mount Pleasant Heights" with Robert E. Heater. Many houses and apartment buildings were constructed between 1900 and 1925. Mount Pleasant was marketed to middle- to upper middle class people. In 1925, the city built the Mount Pleasant Library, designed by Edward Lippincott Tilton and partially funded by philanthropist Andrew Carnegie, to serve the growing community. By 1927, all homeowners in the neighborhood had signed restrictive covenants forbidding sale to African Americans. By the time of World War II, many of the row houses were converted to boarding houses, many of which were occupied by single women. The neighborhood changed after the 1948 decision by the United States Supreme Court in the case of Shelley v. Kraemer, which struck down