now the Plymouth Church of the Pilgrims. Beecher was a nationally known figure famous on the lecture circuit for his novel oratorical style, in which he employed humor, dialect, and slang. Under Beecher, so many slaves passed through Plymouth Church on their way to freedom in Canada that later generations have referred to the church as the "Grand Central Station of the Underground Railroad". To dramatize the plight of those held in captivity, Beecher once brought a female slave to the church and held an auction, with the highest bidder purchasing not the slave, but her freedom. Beecher also raised money to buy other slaves out of captivity, and shipped rifles to abolitionists in Kansas and Nebraska in crates labelled "Bibles", which gave the rifles the nickname "Beecher's Bibles". 20th century The completion of the Brooklyn Bridge in 1883, the Brooklyn end of which was near Brooklyn Heights' eastern boundary, began the process of making the neighborhood more accessible from places such as Manhattan. The Interborough Rapid Transit Company (IRT)'s Lexington Avenue subway line, which reached Brooklyn Heights in 1908, was an even more powerful catalyst in the neighborhood's development. The resulting ease of transportation into the neighborhood and the perceived loss of the specialness and "quality" began to drive out the merchants and patricians who lived there; in time their mansions were divided to become apartment houses and boarding houses. Artists began to move into the neighborhood, as well as writers, and a number of large hotels – the St. George (1885), the Margaret (1889), the Bossert (1909), Leverich Towers (1928), and the Pierrepont (1928), among others – were constructed. By the beginning of the Great Depression, most of the middle class had left the area. Boarding houses had become rooming houses, and the neighborhood began to have the appearance of a slum. During the 1940s and 1950s, the building of the Brooklyn-Queens Expressway (BQE) badly affected the neighborhood, as it took away the neighborhood's northwest corner, destroying whole rows of brownstones. At about the same time, plans began to be developed by New York's "master builder", Robert Moses, wielding the Housing Act of 1949, to replace brownstone rowhouses – which were the typical building form in the neighborhood – with large luxury apartment buildings. A prominent example of the intended outcome is the Cadman Plaza development of housing cooperatives in the northern part of the neighborhood, located on