Descriptive Entry
The main body of the collection consists of incoming and outgoing personal correspondence. However, since Clark was curator and sole employee of the Division of Echinoderms from 1920 to 1950, his personal papers contain some official correspondence generated by the Division of Echinoderms during that period. Also included are papers that document Clark's participation in organizations outside the Smithsonian; records relating to the administration of the Division of Echinoderms; descriptive notes on specimen collections; manuscripts and typescripts; bibliographic references; Addison Emery Verrill material maintained by Clark; and charts and diagrams depicting the comparative Bathymetric distribution of crinoids in the Atlantic and Indo-Pacific Oceans.
Correspondents include: Charles G. Abbot, Alexander Agassiz, Jerome Alexander, Wilfrid B. Alexander, E. J. Allen, Glover Morrill Allen, Joel Asaph Allen, George Andrew Ammann, Rudolf Martin Anderson, N. Annandale, Gilbert Archey, W. Arndt, Benjamin Walworth Arnold, J. P. Ault, Rene Bache, Clement W. Baker, Frank W. Ballou, H. A. Ballou, Outram Bangs, Nathan Banks, Thomas Barbour, H. G. Barnett, Harold L. Barrett, Albert L. Barrows, Paul Bartsch, F. B. Bassett, Charles Foster Batchelder, F. A. Bather, Ted Bayer, George Huddell Beatty III, F. Jeffrey Bell, Foster Hendrickson Benjamin, Marcus Benjamin, Charles T. Berry, Edward Willard Berry, Henry Bryant Bigelow, Lloyd C. Bird, C. V. Blackburn, A. F. Blakeslee, Howard Walter Blakeslee, Frank H. Blumenthal, Gilbert E. Bodkin, Herbert Bolton, H. Boschma, Harold Bowditch, Richard Le Baron Bowen, Jr., George M. Bowers, E. H. Bowie, William Bowie, Isaiah Bowman, George E. Brandt, Charles Marcus Breder, Jr., Walter E. Broadway, Paul Brockett, Alfred H. Brooks, Herbert Janvrin Browne, Charles Thomas Brues, George Kimball Burgess, Thornton W. Burgess, Alfred Cummings Burrill, Philip Powell Calvert, John H. Camp, James McKeen Cattell, Herbert Clifton Chadwick, J. M. Chamberlain, Asa Crawford Chandler, Eloise Christian, James Chumley, Hubert Lyman Clark, Frank Wigglesworth Clarke, John Mason Clarke, Theodore D. A. Cockerell, Hedley L. Coleman, Laurence Vail Coleman, William P. Comstock, Frederick Vernon Coville, Edward M. Crane, James Creese, Jr., Joseph A. Cushman, Edward Salisbury Dana, Violet Dandridge, Hubert J. Davis, William Thompson Davis, Elisabeth Deichmann, John A. Detlefsen, David Dickey, David Henry Dietz, Ludwig Doderlein, Franz Doflein, Cyril F. Dos Passos, James Drummond, Irving H. Dunlap, Charles Rochester Eastman, Ralph Edmunds, K. Ehrenberg, Harry Eltringham, William Keith Emerson, Richard A. Engler, Richard Etheridge, Barton Warren Evermann, David Grandison Fairchild, R. L. Faris, George T. Farran, H. B. Fell, Merritt Lyndon Fernald, Charles John Fish, Walter Kenrick Fisher, John Adam Fleming, Maynard D. Follin, William T. M. Forbes, Alexander Hume Ford, Charles McLean Fraser, E. E. Free, O. Fuhrmann, Louis Germain, John Hiram Gerould, Carl H. Getz, Charles Henry Gilbert, Walter M. Gilbert, Torsten Gislen, Seitaro Goto, Samuel Arnold Greeley, L. Paul Grey, James A. Grieg, Joseph Grinnell, Gilbert Hovey Grosvenor, Maurice C. Hall, Chauncey J. Hamlin, R. Hamlyn-Harris, Sidney Frederic Harmer, Francis Harper, Clemens Hartlaub, Robert Hartmeyer, William Perry Hay, Kenneth Conrad Heald, Nicholas Hunter Heck, Joel Walker Hedgpeth, Edmund Heller, Francis Hemming, Samuel Henshaw, William A. Herdman, P. B. Hill, Edward J. Holmes, R. Horst, William Hovanitz, Leland Ossian Howard, Harrison E. Howe, Mark DeW. Howe, Archibald Gowanlock Huntsman, Louis W. Hutchins, George Evelyn Hutchinson, Albert G. Ingalls, Robert T. Jackson, Frits Johansen, D. Dilwyn John, Charles W. Johnson, T. Harvey Johnston, E. Lester Jones, David Starr Jordan, Harvey Ernest Jordan, Louis Joubin, Ernest Everett Just, Tamiji Kawamura, Vernon L. Kellogg, J. Scott Keltie, Stanley W. Kemp, Theodore G. Kern, Israel Klein, Charles H. Knowles, Rene Koehler, Charles Atwood Kofoid, Alfred L. Kroeber, Nagamichi Kuroda, Alexander Henry Leim, Frank Rattray Lillie, G. W. Littlehales, Burton Edward Livingston, Hubert Ludwig, Victor W. Lyon, Waldo Lee McAtee, George Francis McEwen, Ralph W. Macy, Albert Mann, William M. Mann, George Willard Martin, Bryant Mather, Hiko Matsumoto, John Campbell Merriam, Wilhelm Michaelsen, Roy Waldo Miner, C. C. A. Monro, Henry Frank Moore, Theodor Mortensen, Olaus Johan Murie, Robert Cushman Murphy, National Research Council: American Geophysical Union, Sidney Stevens Negus, Edward W. Nelson, Curtis Lakeman Newcombe, John Treadwell Nichols, Charles Cleve1and Nutting, Hiroshi Ohshima, Henry O'Malley, Wilfred Hudson Osgood, William Patten, Arthur Sperry Pearse, G. Pfeffer, John Charles Phillips, Morten P. Porsild, Carlos E. Porter, Frank A. Potts, Edward E. Prince, Lewis Radcliffe, Mary Jane Rathbun, Richard Rathbun, W. deC Ravenel, George William Rawson, Paul Marshall Rea, Paul S. Redington, August Reichensperger, W. Malcom Reid, Charles L. Remington, Willis Horton Rich, Jules Richard, Charles Wallace Richmond, William Emerson Ritter, Gilbert Thomas Rude, Rudolf Ruedemann, William Edwin Safford, W. N. Sands, Waldo Lasalle Schmitt, M. Jules Schokalsky, Jacob Richard Schramm, Charles Schuchert, Harlow Shapley, Ernest Shoemaker, Allen Shoenfield, Edwin E. Slosson, Edward H. Smith, G. Alex Smith, Hobart Muir Smith, Thomas Elliot Snyder, Arthur deC Sowerby, Frank Springer, J. Foster Stackhouse, Leonhard Stejneger, Charles Wardell Stiles, Matthew Stirling, Witmer Stone, Abbott H. Thayer, R. J. Tillyard, Olga A. Titelbaum, Walter Edmond Clyde Todd, Charles Henry Tyler Townsend, Frank W. Trainer, Parker Davies Trask, Frederick William True, Harold C. Urey, Frederick William Urich, W. A. J. M. Van Waterschoot, Van Der Gracht, C. Vaney, Ernst Vanhoffen, T. Wayland Vaughan, Addison Emery Verrill, Warren Herbert Wagner, Jr., Charles D. Walcott, Henry Baldwin Ward, Henry Stephen Washington, Francis Watts, Max C. W. Weber, Alexander Wetmore, David White, Edward Wigglesworth, C. B. Williams, Carroll E. Wood, Casey W. Wood, H. E. Woodcock, Bernard H. Woodward.