- Pollard, William Edward, 1915-20131
- Rubinow, I. M. (Isaac Max), 1875-19361
- Scarborough, W. S. (William Sanders), 1852-19261
- Schurz, Carl, 1829-19061
- Shepard, Edward Morse, 1850-19111
- Snelson, Floyd Grant, 1865-19321
- Stone, Alfred Holt, 1870-19551
- Thirkield, W. P. (Wilbur Patterson), 1854-19361
- Thomas, Norman, 1884-19681
- Tweedy, Henry Hallam, 1868-19531
- Twichell, Joseph Hopkins, 1838-19181
- Waring, George E. (George Edwin), 1833-18981
- Withers, John W. (John William), 1868-1961--Correspondence1
- Woodford, Stewart L. (Stewart Lyndon), 1835-19131
