Architectural drawings and photographs of Hoppin and Koen designs including alterations to the residence of R.T. Wilson, Jr., 15 East 57th Street, New York, 1905; Albany County Courthouse, Albany, New York, 1913-1915; Mount Morris Theater at Fifth Avenue and 116th Street, New York, 1911-1912; New York City Fire Department building, East 111th Street and Second Avenue, 1911; Manhattan terminal of the Brooklyn Bridge, undated, not constructed; residences of George B. McClellan at Princeton, New Jersey, and Washington, D.C., 1922; Edith Wharton and Edward Wharton's Lenox, Massachusetts, home, the Mount; New York City Police Headquarters, 240 Centre St., New York; and others.