The series consists of correspondence relating to brownstones and the urban historic preservation movement, especially in the Park Slope neigborhood of Brooklyn, dating from 1965 to 2005. It includes several organizations, such as the Park Slope Betterment Committee, the Brownstone Revival Committee, and the Back to the City Conference. It also includes several local politicians, such as U.S. Congressman Fred Richmond, U.S. Congresswoman Yvonne B. Burke, U.S. Congressman Leo C. Zefferetti, Mayor Edward I. Koch, and Borough President Howard Golden.
Of note are letters urging local banks to extend mortgage loans to homebuyers in the previously "red-lined" neighborhood of Park Slope in the 1960s.