- Root, Elihu, 1845-19376
- Triborough Bridge Authority6
- Trinity Church (New York, N.Y.)6
- United States6
- Viele, Egbert L. 1825-19026
- Wittemann, A. 1845-19386
- Beauchamp, William Martin, 1830-19255
- Beers, F. W5
- Belden, E. Porter 1823-19115
- Biltmore (Hotel : New York, N.Y.)5
- Cathedral of St. John the Divine (New York, N.Y.)5
- City Club of New York5
- D. Appleton and Company5
- Darley, Felix Octavius Carr, 1822-18885
- Doggett, John, 1809-18525
- Franklin, Benjamin, 1706-17905
- Friedman, Edwin5
- Hall, Edward Hagaman, 1858-19365
- Henry, O., 1862-19105
- Inner Circle (New York, N.Y.)5
- John Wanamaker (Firm)5
- L.H. Nelson Company5
- McCabe, James D., 1842-18835
- Moore, George Henry, 1823-18925
- New York (N.Y.). Board of Aldermen5
- New York (N.Y.). Police Department5
- New York (State). Office of Planning Coordination5
- New York (State). State Historian5
- New York University5
- Skinner, Alanson, 1886-19255
- Smith, William, 1728-17935
- Susan B. Anthony Collection (Library of Congress)5
- Tri-State Regional Planning Commission5
- United States. Congress., House., Committee on Commerce5
- Waldorf-Astoria Hotel (New York, N.Y.)5
- American Society of Civil Engineers4
- Bache, A. D. 1806-18674
- Churchill, Allen, 1911-19884
- Citizens Union (New York, N.Y.)4
- De Lancey, Edward F. 1821-19054
- Disturnell, John, 1801-18774
- Dripps, M4
- Fernow, Berthold, 1837-19084
- Foster, George G., -18564
- Furman, Gabriel, 1800-18544
- G.W. & C.B. Colton & Co4
- Gales & Seaton4
- Geological Survey (U.S.)4
- Grand Union Hotel (New York, N.Y.)4
- Grolier Club4
- Group Research Collection (Columbia University. Libraries)4
- Hilton New York (Hotel)4
- Hotel Astor (New York, N.Y.)4
- Hungerford, Edward, 1875-19484
- Matthews, Brander, 1852-19294
- Mercantile Library Association of the City of New-York4
- Mitchell, Herbert4
- Muller, Thomas, 1933-4
- Museum of the City of New York4
- New School for Social Research (New York, N.Y. : 1919-1997). Center for New York City Affairs4