Architectural drawings for buildings designed by Hamlin including proposed alterations for the Charles Dudley Warner House, circa 1885; pumping station Clear Stream (or Clear Stream Station), Long Island, 1886; American Classical School, Athens, Greece, 1886-1888; proposed cottage for Mrs. R. Hoe at Sea Cliff, Long Island, 1887; an addition to Clinton Hall at Blair Presbyterian Academy, Blairstown, New Jersey, circa 1896; Soldier's Monument, Whitinsville, Massachusetts, circa 1904 (Hamlin was the architect and Herman A. MacNeil was the sculptor); and miscellaneous and unidentified structures. Also included are drawings done by Hamlin while a student at the Massachusetts Institute of Technology, 1876-1877; sketches done by Hamlin on travels both in the United States and abroad, 1867-1923; photographs of various unidentified buildings and architectural drawings; manuscripts of "ARCHITECTURAL SHADES AND SHADOWS" with related drawings"History of American Art" (unfinished, in French), circa 1923, and "MODERN ARCHITECTURE AND THE CRITICS" circa 1923. Personal materials included undated photographs of A.D.F. Hamlin; a photograph of an 1835 portrait of Cyrus Hamlin; a volume containing condolences, 1926, on the occasion of A.D.F. Hamlin's death; and a scrapbook"Memoirs of Amherst, Class of '75" containing programs, invitations, clippings, notes, essays, exam questions, steamship passenger lists, and other materials.

Included are drawings--from preliminary sketches to finished renderings--done by students in the architecture program at the School of Mines at Columbia and, later, at the School of Architecture at Columbia. The bulk of these were done circa 1884-1912, during the tenures of Deans William Robert Ware (1881-1903) and A.D.F. Hamlin (1903-1912). Included in collection are student drawings by William A. Boring, Harry Allan Jacobs, Benjamin Wistar Morris, Jr., Julian Clarence Levi, Arthur Ware, Talbot Faulkner Hamlin, Leopold F. Arnaud, Perry Coke Smith, Theodor Karl Rohdenburg, and Aladar Olgyay. Also, drawings done by architecture students at the Massachusetts Institute of Technology, circa 1880s; a photograph, undated, of William Robert Ware; and one drawing, 1879, by architect Cass Gilbert.

Additional materials include carbons of typescript correspondence of lectures given by Dean William A. Boring (academic year 1933-1934) and Professor Theodor Karl Rohdenburg (academic year 1946-1947). Also design problems, the earliest of which were given in conjunction with the Beaux-Arts Institute of Design, from academic years 1918-1919, 1926-1927, 1936-1937, 1949-1950, and 1957-1958. Also materials for the Architecture 51 class; correspondence of Joseph Hudnut; course outlines; correspondence relating to the search for a new dean of the school, 1957-1963.