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- Hughes, Edwin, 1884-1965<br>Correspondence<br>Eaton, Quaintance1
- Hughes, Edwin, 1884-1965<br>Correspondence<br>Faine, Hy1
- Hughes, Edwin, 1884-1965<br>Correspondence<br>Weston, Harold, 1894-1972<br>Humphrey, Hubert H.1
- Hughes, Edwin, 1884-1965<br>United States. Dept. of State.<br>United States. Bureau of Educational and Cultural Affairs.<br>United States. Advisory Committee on the Arts<br>Correspondence<br>Ellison, Charles M.1
- Hutcheson, Ernest, 1871-19511
- Hutcheson, Ernest, 1871-1951.1
- Istomin, Eugene1
- Jona?s, Alberto, 1868-1943.1
- Juilliard School of Music1
- Kos?ciuszko, Tadeusz, 1746-18171
- Kosciuszko Foundation1
- Kosciuszko Foundation<br> Leschetizky, Theodor, 1830-1915<br> Concert programs<br> Hughes, Edwin, 1884-1965<br> Paderewski, Ignace Jan, 1860-19411
- Kreisler, Fritz, 1875-19621
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